“150”, Aptitude Test Questions and Answers for Veterinary Officer II – MDA & LGA.
ABSTRACT
This preparation package contains 150
premium multiple-choice aptitude test questions and answers for DAKTARI WA
MIFUGO DARAJA LA II (Veterinary Officer II) – LGA & MDA, Tanzania. The
questions are designed to reflect the analytical, technical and practical
understanding expected in Public Service online aptitude tests. They cover
veterinary disease diagnosis and control, epidemiology, livestock health,
animal welfare, meat inspection, slaughterhouse hygiene, vaccination,
biosecurity, surveillance, zoonotic diseases, veterinary inputs, livestock
movement and disease reporting. The questions use closely related distractors
to challenge candidates' understanding and decision-making rather than simple
memorization. Each question is accompanied by the correct answer and a clear
professional rationale to support effective preparation.
Prepared by: Veterinary Officer II
Compiled by Veterinary Officer II
0628729934.
Date: August 20, 2026
Dear applicants,
This collection of questions and answers
has been prepared to help all of you to understand the key areas tested during
the interview. The goal is to provide a useful, and practical study guide so
you can all perform confidently and fairly in the selection process. I wish you
the best of luck, and may this resource support you in achieving success!
Warm regards,
Veterinary Officer II
For Personal Use by Applicants Preparing
for MDA and LGA Veterinary Officer II at Public Service Recruitment Service.
ALL
QUESTIONS ARE COMPILED TOGETHER.
1. A cattle
herd in an area of Tanzania develops sudden high fever, excessive salivation,
vesicles in the mouth and around the feet, followed by lameness in several
animals. The disease spreads rapidly after cattle from another area are
introduced into the herd. As the Veterinary Officer responsible for the area,
which action is most appropriate as the immediate disease-control priority?
A. Initiate
movement control and investigate the outbreak promptly B. Begin antibiotic treatment of all
clinically affected cattle C. Vaccinate only the clinically affected
cattle immediately D. Allow controlled movement while awaiting
laboratory confirmation
Answer: A
Rationale: The combination of fever, oral and foot
lesions, salivation, lameness and rapid transmission strongly suggests a highly
contagious transboundary disease such as foot-and-mouth disease. The immediate
priority is to prevent further spread while the outbreak is investigated and
appropriate confirmation and control measures are undertaken. Movement control
reduces opportunities for infected animals and contaminated materials to
disseminate the disease. Antibiotics do not control the causative viral
infection, vaccination is not a substitute for immediate outbreak containment,
and allowing movement while waiting for confirmation could facilitate wider
transmission.
2. During
investigation of a suspected infectious disease outbreak, a Veterinary Officer
finds that 18 of 60 cattle introduced into a village during the previous two
weeks developed clinical signs. Which epidemiological measure best describes
the proportion of the exposed cattle that became clinically affected during
this outbreak period?
A. Prevalence
rate B. Attack rate C.
Case fatality rate D. Mortality rate
Answer: B
Rationale: Attack rate is particularly useful during
outbreaks because it measures the proportion of an initially exposed or
susceptible population that develops the disease during a specified period.
Here, the relevant denominator is the 60 cattle exposed through introduction,
while the numerator is the 18 that became clinically affected. Prevalence
measures existing disease in a population at a particular time or period, case
fatality measures deaths among diagnosed cases, and mortality measures deaths
in the overall population.
3. A district
veterinary laboratory reports that samples from several pigs with fever,
weakness, skin discoloration and sudden deaths are strongly suggestive of
African swine fever. The disease has not previously been confirmed in that
locality. What should the Veterinary Officer regard as the most important
immediate consideration?
A. Treat the
pigs with broad-spectrum antibiotics B.
Dispose of carcasses without recording the suspected outbreak C.
Prevent spread while initiating official investigation and reporting D.
Resume normal pig movements until laboratory confirmation is completed
Answer: C
Rationale: African swine fever is a serious, highly
contagious disease of pigs for which rapid containment and official disease
reporting are critical. When the clinical and epidemiological evidence creates
a strong suspicion, the Veterinary Officer should act to limit dissemination
while following the required investigation, sampling and notification
procedures. Antibiotics do not eliminate the viral infection, undocumented
disposal prevents proper epidemiological investigation, and unrestricted
movement could spread infection to other herds before confirmation is
finalized.
4. A dairy
farmer reports repeated abortions in cattle, including several abortions
occurring during the same period. Some farm workers have also experienced
unexplained febrile illness. Which approach would provide the Veterinary
Officer with the most appropriate initial epidemiological perspective?
A. Investigate
the problem exclusively as a reproductive disorder B. Treat the cattle first and
investigate workers only if signs persist C. Assume the workers have an
unrelated occupational illness D. Investigate a possible zoonotic
infection using a One Health approach
Answer: D
Rationale: Repeated abortions in cattle accompanied
by illness among exposed people should immediately raise concern about a
possible zoonotic disease. A One Health approach recognizes that animal, human
and environmental health are interconnected and therefore requires coordinated
investigation rather than treating the livestock and human-health components as
unrelated problems. The Veterinary Officer should investigate the herd,
exposure pathways, relevant samples and epidemiological links while
coordinating appropriately with human-health authorities.
5. During a
routine livestock inspection, a Veterinary Officer observes that cattle from
several villages are being mixed at a market before being transported to
different destinations. One animal appears febrile and has abnormal nasal
discharge. What is the most appropriate professional response?
A. Ignore the
animal because clinical diagnosis cannot be made at the market B. Isolate the suspect animal and
initiate appropriate veterinary investigation C. Permit the animal to
travel but record its identification for follow-up D. Treat the animal
and allow immediate release once temperature decreases
Answer: B
Rationale: A potentially infectious animal in a
livestock market represents a significant disease-transmission risk because
animals from multiple sources are being mixed and subsequently redistributed.
The Veterinary Officer should prevent the suspect animal from continuing
through the marketing chain, isolate it appropriately and conduct the necessary
clinical and epidemiological assessment. Simply recording the animal without
controlling its movement leaves other livestock at risk, while treatment
without establishing the cause may mask clinical signs without addressing the
transmission risk.
6. A beef
cattle herd in a Tanzanian grazing area shows poor growth, rough hair coats and
reduced feed efficiency despite adequate pasture availability. Several animals
have pale mucous membranes and a history of heavy parasite exposure. Which
finding would most strongly support a significant gastrointestinal parasitic
burden as a contributing cause?
A. Persistent
pale mucous membranes accompanied by progressive weight loss B. Increased body condition
accompanied by reduced grazing activity C. Normal mucous membranes
accompanied by rapid weight gain D. Increased milk yield accompanied by
improved body condition
Answer: A
Rationale: Pale mucous membranes together with
progressive weight loss in animals exposed to heavy parasite challenge can
indicate significant parasitism, particularly where blood-feeding
gastrointestinal parasites are involved. The clinical picture should not be interpreted
in isolation, and the Veterinary Officer should consider faecal examination,
pasture exposure, body condition and other differential diagnoses before
confirming the cause. The other combinations are less consistent with a
significant parasitic burden and would not provide the same level of supporting
evidence.
7. A dairy
herd in Tanzania has repeated cases of milk fever shortly after calving,
particularly among high-producing cows. Which management measure would most
directly help reduce the risk of this metabolic disorder?
A. Increase
dietary calcium sharply throughout the entire dry period B. Manage the transition diet to
support appropriate calcium homeostasis around calving C. Restrict all
mineral supplementation during the lactation period D. Increase
concentrate feeding immediately after every clinical episode
Answer: B
Rationale: Milk fever, or hypocalcaemia around
calving, is associated with the sudden demand for calcium required for
colostrum and milk production. Prevention focuses on appropriate
transition-period nutritional management that supports the cow's ability to
mobilize and regulate calcium effectively at calving. Simply providing
excessive calcium throughout the dry period is not the preferred general
preventive strategy and can interfere with normal calcium homeostasis.
Management should be based on herd risk, nutritional assessment and appropriate
veterinary advice.
8. During
ante-mortem inspection at a slaughter facility, a cow is found to be severely
depressed, unable to stand and showing marked abnormal clinical signs. What is
the Veterinary Officer's most appropriate concern before slaughter proceeds?
A. Whether the
carcass will produce enough meat for the owner B. Whether the animal has received
adequate feed before arrival C. Whether the animal has reached the
expected market weight D. Whether the animal is fit for slaughter and
requires appropriate disposition
Answer: D
Rationale: Ante-mortem inspection is intended, among
other purposes, to assess the health and fitness of animals presented for
slaughter and to identify animals requiring special handling, isolation,
further examination or exclusion from normal slaughter procedures. A severely
depressed, recumbent animal with significant clinical abnormalities requires
veterinary assessment before slaughter. Meat yield, feeding history and market
weight are secondary considerations and cannot override animal-health and
food-safety requirements.
9. A
slaughterhouse repeatedly records contamination of carcasses with intestinal
contents during evisceration. Which corrective measure would most directly
address the primary processing problem?
A. Increase
the holding time of carcasses after inspection B. Improve hygienic evisceration
procedures and worker practices C. Increase the number of animals
slaughtered during each shift D. Extend the period animals remain in
the lairage before slaughter
Answer: B
Rationale: Intestinal-content contamination during
evisceration is principally a hygienic processing problem and can introduce
enteric pathogens onto meat surfaces. Corrective action should focus on proper
evisceration technique, equipment handling, worker hygiene, separation of clean
and contaminated processes, and effective sanitation. Increasing slaughter
volume or holding time does not correct the source of contamination, while
extending lairage time could create additional welfare and hygiene problems.
10. A
Veterinary Officer receives reports of sudden deaths among cattle in a village,
with some animals found dead without a prolonged period of illness. The
carcasses have not yet been opened. Which precaution is most appropriate while
investigating a disease such as anthrax is suspected?
A. Open all
carcasses to determine the cause visually B. Move carcasses to the nearest livestock market for
inspection C. Avoid unnecessary opening of carcasses and follow
appropriate investigation procedures D. Encourage farmers to bury
carcasses only after removing the hides
Answer: C
Rationale: Anthrax should be considered when sudden
unexplained deaths occur, particularly where compatible epidemiological and
clinical circumstances exist. Opening a carcass of an animal suspected of
anthrax can expose people and contaminate the environment by promoting
formation and dissemination of bacterial spores. The appropriate response is to
avoid unnecessary carcass opening and follow veterinary disease-investigation
and safe carcass-disposal procedures. Removing hides or transporting carcasses
could increase exposure and environmental contamination.
11. A herd has
a high number of animals with diarrhoea, but the Veterinary Officer observes
that most affected animals recovered without treatment and deaths were rare.
Which additional information would be most useful for assessing the severity of
the outbreak?
A. The
proportion of affected animals that died B. The average market value of affected animals C.
The distance between the farms and the district office D. The
proportion of animals that were previously vaccinated
Answer: A
Rationale: The proportion of affected animals that
die provides an important indication of disease severity and is expressed
through the case fatality rate. A high number of cases does not necessarily
mean that the disease is highly lethal. Market value and distance to the
district office do not directly measure clinical severity. Vaccination history
may be highly relevant to understanding susceptibility and prevention, but it
does not itself quantify how severe the disease has been among affected
animals.
12. A farmer
presents a cow with chronic weight loss, poor production and intermittent
respiratory signs. Several other cattle in the same herd have shown similar
gradual deterioration. Which approach would be most appropriate before
selecting a definitive treatment programme?
A. Assume
nutritional deficiency because weight loss is present B. Give antibiotics immediately
without collecting further information C. Investigate history, clinical
findings and appropriate diagnostic possibilities D. Cull the entire
herd solely because several animals have lost weight
Answer: C
Rationale: Chronic weight loss and reduced
productivity have numerous possible causes, including infectious diseases,
parasitism, nutritional deficiencies and chronic organ disorders. A responsible
Veterinary Officer should first obtain a detailed history, perform an
appropriate clinical examination and develop a differential diagnosis before
selecting treatment or control measures. Prematurely attributing the problem to
nutrition, administering empirical antibiotics without adequate assessment, or
destroying the entire herd without evidence would be professionally
inappropriate.
13. A
Veterinary Officer examines a calf with severe diarrhoea and dehydration.
Before administering fluid therapy, which finding is most important for
determining the urgency and intensity of supportive treatment?
A. The colour
of the calf's hair coat B.
The degree of dehydration and circulatory compromise C. The breed
preferred by the farmer D. The market value of the calf
Answer: B
Rationale: The degree of dehydration and the
presence of circulatory compromise are central to assessing the urgency and
appropriate intensity of fluid therapy in a calf with severe diarrhoea.
Significant fluid and electrolyte losses can rapidly lead to weakness, reduced
perfusion, shock and death. Clinical assessment should include relevant
indicators such as mucous membranes, skin elasticity, eye position, pulse and
overall responsiveness, with treatment tailored to the severity and underlying
cause. Breed preference and market value have no direct role in determining
fluid requirements.
14. A
livestock disease has been confirmed in one village, and epidemiological
investigation identifies a second village whose animals had frequent contact
with the affected herd during the likely infectious period. Although no
clinical cases have yet been observed in the second village, how should the
second village be regarded during the investigation?
A. As an
irrelevant area because no clinical cases exist B. As a confirmed outbreak area
because contact has occurred C. As an area requiring risk-based
surveillance and appropriate precautions D. As an area requiring
immediate treatment of every animal
Answer: C
Rationale: Exposure does not automatically mean that
disease has been confirmed, but it can place a population at increased risk.
The second village should therefore receive enhanced surveillance and
appropriate preventive measures based on the epidemiological assessment. It
would be incorrect to declare the village confirmed solely because contact
occurred, while ignoring it would miss an important potential transmission
pathway. Mass treatment of every animal is also inappropriate without knowing
the disease and whether treatment is effective or indicated.
15. During
inspection of a livestock-input outlet, a Veterinary Officer finds veterinary
medicines stored under conditions that may compromise their quality. The most
appropriate regulatory response should primarily focus on:
A. Assessing
storage compliance and protecting the quality and safety of veterinary products B. Allowing continued sale because
the products are already legally packaged C. Removing only products
whose labels appear visually damaged D. Recommending that farmers
determine product quality through personal experience
Answer: A
Rationale: Proper storage is essential because
inappropriate temperature, humidity, light exposure or other conditions can
compromise the quality, efficacy and safety of veterinary medicines and
biological products. Veterinary regulatory oversight therefore extends beyond
packaging and includes appropriate storage, handling and compliance with
applicable requirements. Visually intact packaging does not guarantee product
quality, and farmers should not be expected to determine pharmaceutical quality
through trial and error.
16. A dairy
farmer notices that several cows have reduced milk production, swollen udders
and abnormal milk shortly after calving. The Veterinary Officer suspects
mastitis. Which management factor should be assessed particularly carefully
because it can contribute to transmission between cows during milking?
A. The colour
of the cows' coats B.
The age of the farm buildings C. The sequence and hygiene of milking
procedures D. The distance from the farm to the livestock market
Answer: C
Rationale: Milking procedures can strongly influence
the transmission of mastitis-causing organisms between animals. The Veterinary
Officer should assess udder preparation, hand hygiene, teat disinfection,
milking order, equipment sanitation and practices involving clinically affected
cows. Poor hygiene or inappropriate milking sequence can facilitate transfer of
pathogens from infected to susceptible animals. Coat colour, building age and
market distance do not directly explain transmission during the milking process.
17. A newly
purchased group of calves develops coughing, nasal discharge and fever several
days after arrival at a farm. The calves came from different sources and were
mixed before being introduced into the main herd. Which management weakness
should the Veterinary Officer investigate most directly?
A. The colour
and breed distribution of the calves B.
The length of time the calves remained in the market C. The amount of
feed supplied during transportation D. The absence of an appropriate
quarantine and introduction procedure
Answer: D
Rationale: Mixing calves from different sources and
introducing them directly into an established herd can increase the risk of
introducing and transmitting respiratory pathogens. An appropriate quarantine
and introduction procedure allows newly arrived animals to be observed,
assessed and managed separately before contact with the resident population.
Although transportation stress and nutrition can influence susceptibility, the
absence of separation and health assessment is the more direct management
weakness identified by the scenario.
18. A
Veterinary Officer finds that a dairy herd has experienced repeated cases of
retained fetal membranes and poor conception after calving. The farm has
recently reduced the quality of its dry-period feeding programme. Which aspect
should be investigated most closely as a possible contributing factor?
A. The
nutritional status of cows during the transition and early postpartum period B. The colour of the farm's milking
equipment C. The distance between the farm and the nearest livestock
market D. The age of the farmer responsible for the herd
Answer: A
Rationale: Nutritional status during the transition
period can influence immune function, metabolic health and reproductive
performance after calving. Poor nutrition may contribute to problems such as
retained fetal membranes, delayed recovery and impaired conception, although
infectious and other causes must also be considered. The Veterinary Officer
should assess the ration, body condition, mineral management, disease history
and reproductive records before attributing the problem to nutrition alone. The
other factors have little direct relevance to the described reproductive
pattern.
19. A
Veterinary Officer is called to a farm where several sheep show excessive
salivation, grinding of the teeth, abdominal discomfort and reduced appetite.
The farmer requests immediate treatment, but the clinical picture is not
specific to one condition. What is the most appropriate first step?
A. Administer
several unrelated medicines simultaneously B. Establish a differential diagnosis using history and
clinical examination C. Assume the problem is infectious because
several sheep are affected D. Treat only the sheep showing the most
severe signs
Answer: B
Rationale: Clinical signs such as excessive
salivation, teeth grinding, abdominal discomfort and reduced appetite can occur
in several gastrointestinal, toxic, metabolic and other conditions. Because the
signs are not sufficiently specific to establish a diagnosis, the Veterinary
Officer should obtain a detailed history and perform an appropriate clinical
examination before selecting treatment. The investigation should consider feed
changes, poisoning, obstruction, gastrointestinal disease and other relevant
possibilities. Empirical use of multiple medicines can obscure the clinical
picture and may cause additional risks.
20. A farmer
intends to sell milk from cows that have recently received a veterinary
medicine. The treatment record indicates that the product has a specified milk
withdrawal period. What should the Veterinary Officer emphasize?
A. Milk may be
sold immediately if the cow appears clinically normal B. The withdrawal period applies only
when the animal is severely ill C. Milk should be withheld for the
specified period to minimize unacceptable drug residues D. Mixing
treated cows' milk with untreated milk eliminates residue concerns
Answer: C
Rationale: Veterinary medicines can leave residues
in milk and other animal products after treatment. Where a product specifies a
milk withdrawal period, milk from treated animals should not enter the food
chain during that period unless the applicable instructions provide otherwise.
Clinical recovery does not mean that drug residues have necessarily fallen to
acceptable levels. Mixing milk from treated and untreated animals does not
eliminate the residue problem and can contaminate a larger quantity of product.
21. At the
livestock–wildlife interface, a Veterinary Officer receives reports that cattle
grazing near a wildlife area have developed a disease also suspected among wild
animals. What is the most appropriate initial professional approach?
A. Investigate
livestock and wildlife components together and assess possible transmission
pathways B. Focus
exclusively on domestic animals because wildlife cannot be controlled directly C.
Assume that wildlife is the source before completing epidemiological
investigation D. Recommend eliminating wildlife around the grazing area
as the first intervention
Answer: A
Rationale: Diseases occurring at the
livestock–wildlife interface require investigation of both populations because
pathogens may move between wildlife, livestock and sometimes humans through
direct or indirect pathways. The Veterinary Officer should therefore assess
animal contacts, environmental factors, movement patterns and other potential
transmission routes while coordinating with relevant authorities. Assuming
wildlife is automatically responsible without evidence can lead to incorrect
control measures, while eliminating wildlife is neither an appropriate
first-line epidemiological response nor a substitute for investigation.
22. A
herd-health programme shows that a disease is maintained by a small number of
apparently healthy animals that continue to carry and potentially transmit the
infectious agent. Which concept is most relevant when designing the control
programme?
A. Clinical
treatment alone will necessarily eliminate transmission B. Disease control should consider
carriers and apparently healthy infected animals C. Only animals with
severe clinical signs should be included in surveillance D. Vaccination
is unnecessary whenever clinical cases are detected
Answer: B
Rationale: Some infectious diseases can persist
because infected or carrier animals may appear clinically normal while
remaining capable of transmitting the pathogen. Effective control therefore
requires consideration of the carrier state, appropriate testing or surveillance
where applicable, movement management and other measures suited to the
particular disease. Focusing exclusively on clinically sick animals can leave
an important reservoir of infection undetected. Treatment and vaccination
strategies must also be selected according to the specific disease rather than
assumed to be universally sufficient or unnecessary.
23. A
Veterinary Officer is examining a flock of chickens with reduced growth, poor
feed conversion and increased mortality. Post-mortem examination reveals
numerous intestinal lesions. Which additional information would be most useful
for distinguishing a parasitic intestinal problem from other causes?
A. The colour
of the poultry house walls B.
The breed name recorded by the farmer C. The age of the birds, litter
conditions and relevant faecal or post-mortem findings D. The distance
between the poultry house and the nearest livestock market
Answer: C
Rationale: Age, housing and litter conditions,
together with relevant faecal or post-mortem findings, can provide important
evidence when investigating intestinal parasitism in poultry. Certain parasites
have age-related patterns and can be associated with contaminated litter or
housing environments. These findings should be interpreted alongside clinical
signs, flock history and appropriate laboratory examination. Wall colour,
market distance and breed name alone provide little diagnostic value for
distinguishing intestinal parasitic disease from other causes of poor growth
and mortality.
24. A
Veterinary Officer discovers that a dairy farm has been selling milk from
animals treated with veterinary medicines without maintaining adequate
treatment records. Which risk is most directly created by this practice?
A. Reduced
genetic diversity of the dairy herd B.
Increased likelihood of excessive livestock movement C. Reduced ability
to determine which animals require appropriate product withdrawal periods D.
Increased likelihood that all treated animals will develop clinical disease
Answer: C
Rationale: Treatment records are essential for
identifying treated animals, determining which veterinary products were
administered and ensuring that the relevant withdrawal periods are respected
before animal products enter the food chain. Without reliable records, the
farmer may be unable to distinguish milk that should be withheld from milk that
is safe to market, increasing the risk of unacceptable residues. The absence of
records does not directly cause genetic changes, livestock movement or clinical
disease, but it creates a significant food-safety and regulatory problem.
25. A
Veterinary Officer is assessing a herd in which calves have repeatedly
developed poor growth despite apparently adequate feed availability. The calves
have access to good-quality forage but receive no additional mineral
supplementation. Which investigation would be most appropriate before
concluding that the problem is infectious?
A. Assess the
nutritional composition of the diet and possible mineral deficiencies alongside
other differential diagnoses B.
Begin antibiotic treatment for the entire calf population immediately C.
Assume that adequate forage guarantees adequate mineral intake D.
Remove all affected calves from the farm without conducting further assessment
Answer: A
Rationale: Adequate forage quantity does not
necessarily guarantee that animals receive sufficient amounts or balance of
essential minerals and nutrients. Mineral deficiencies can contribute to poor
growth, impaired productivity and increased susceptibility to other health
problems. The Veterinary Officer should therefore assess diet quality, mineral
content, intake, body condition and other relevant management factors while
maintaining appropriate infectious and parasitic differentials. Premature
antibiotic treatment or removal of animals without establishing the underlying
cause would not provide a sound herd-health solution.
26. A dairy
herd has experienced a gradual decline in milk production over several months.
The farmer reports poor body condition in some cows, while others appear
clinically normal. The herd has also recently experienced increased tick
infestation. Which approach would provide the most appropriate basis for
determining the cause of the production decline?
A. Assume the
decline is caused by inadequate feed alone B. Treat all cattle for bacterial disease without
further assessment C. Investigate nutrition, parasites, infectious
disease and management factors together D. Cull the lowest-producing
cows before conducting further investigation
Answer: C
Rationale: A gradual decline in milk production with
variable body condition and increased tick exposure can have multiple
interacting causes, including nutritional deficiencies, parasitism, tick-borne
diseases, chronic infections and management problems. A Veterinary Officer
should therefore undertake a systematic herd-level investigation rather than
attributing the problem to one cause prematurely. Examining feeding, parasite
burden, disease history, reproductive performance, management practices and
relevant clinical or laboratory findings provides a stronger basis for
diagnosis and control. Immediate mass treatment or culling without identifying
the underlying problem may waste resources and fail to correct the actual
cause.
27. A farmer
reports that several goats developed sudden weakness, diarrhoea and death after
being introduced into a new grazing area. The affected goats came from
different previous locations and were mixed shortly before the outbreak. Which
information would be most useful for identifying a common epidemiological link?
A. The colour
and breed of each affected goat B.
The movement history and timing of contact among the goats C. The
market value of the goats before introduction D. The individual
farmer's preferred treatment method
Answer: B
Rationale: Movement history and timing of contact
can reveal where animals originated, when they were exposed, which animals
interacted and the sequence between exposure and disease onset. This
information is particularly valuable when animals from different locations are
mixed before an outbreak. Breed and colour may occasionally be relevant but are
generally less useful for establishing a transmission pathway. Market value and
treatment preferences provide little evidence about how an infectious disease
was introduced or spread among the animals.
28. During a
disease investigation, the Veterinary Officer finds that the number of reported
cases increased sharply immediately after a new community-based surveillance
programme began. Which interpretation is most appropriate?
A. The disease
must necessarily have become more severe B. The surveillance programme must have caused the
outbreak C. The increase may partly reflect improved detection and
reporting D. The previous surveillance records should automatically be
discarded
Answer: C
Rationale: An increase in reported cases after
surveillance improves does not necessarily mean that actual disease occurrence
increased by the same magnitude. Improved case detection, community awareness
and reporting can reveal cases that previously went unrecorded. The Veterinary
Officer should therefore compare surveillance methods, population coverage and
historical information before concluding that disease transmission has suddenly
intensified. Existing records should not automatically be discarded because they
may still provide useful baseline information when interpreted according to
their limitations.
29. A
Veterinary Officer suspects that a livestock disease is being transmitted
through contaminated equipment shared between farms. Which control measure
would most directly interrupt this suspected transmission route?
A. Increase
the body weight of susceptible animals B.
Change the breed composition of affected herds C. Increase livestock
sales during the outbreak period D. Strengthen cleaning, disinfection
and equipment hygiene between farms
Answer: D
Rationale: If contaminated equipment is suspected to
be a vehicle for disease transmission, cleaning and appropriate disinfection
between farms directly targets that pathway. Effective biosecurity should
reduce the movement of infectious material through equipment, clothing,
vehicles and other fomites. Increasing animal weight, changing breeds or
increasing sales does not address contamination and may potentially increase
opportunities for disease spread. The exact cleaning and disinfection procedure
should be selected according to the suspected pathogen and applicable
veterinary requirements.
30. During
post-mortem examination of a sheep, the Veterinary Officer observes numerous
small white cyst-like structures within the muscles. Which consideration should
be given priority when deciding the appropriate meat-inspection action?
A. Whether the
animal was purchased from a distant market B. Whether the owner requires immediate payment for the
carcass C. Whether the lesions indicate a parasitic condition affecting
meat suitability D. Whether the sheep received sufficient feed before
slaughter
Answer: C
Rationale: Multiple cyst-like structures within
skeletal muscle may indicate a parasitic condition such as cysticercosis, which
requires proper veterinary assessment to determine the extent of infection and
appropriate carcass disposition. Meat inspection decisions should be based on
the nature, distribution and significance of the lesions and applicable
regulatory standards. The animal's purchase location, owner's financial
circumstances and feeding history do not determine whether affected meat is
suitable for human consumption.
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