Free Veterinary Public Health and Zoonoses MCQs with Answers

• A. Adenovirus
• B. Parapoxvirus
• C. Retrovirus
• D. Dermatophyte

Explanation: Orf is caused by Orf virus, a member of the Parapoxvirus genus. It produces proliferative skin lesions in infected small ruminants and may…

• A. Cercariae in fresh milk
• B. Eggs in raw meat
• C. Metacercariae on aquatic plants
• D. Adult flukes in dry fodder

Explanation: The metacercaria is the encysted infective stage found on aquatic vegetation such as watercress.

• A. A freshwater fish
• B. A freshwater snail
• C. A dung beetle
• D. An infected flea

Explanation: Dipylidium caninum larvae develop in fleas, and humans, especially children, may become infected by swallowing an infected flea.

• A. To detect unsafe animals and carcasses
• B. To increase the weight of carcasses
• C. To improve the color of meat
• D. To replace cold storage of meat

Explanation: Meat inspection identifies diseased animals and abnormal carcasses that may be unsafe for human consumption.

• A. Intact hair shafts
• B. Broken skin or mucous membranes
• C. The external surface of clothing
• D. Unbroken fingernails

Explanation: Leptospira can penetrate abraded skin or mucous membranes after contact with urine contaminated water or soil.

• A. Bacillus cereus
• B. Corynebacterium diphtheriae
• C. Erysipelothrix rhusiopathiae
• D. Staphylococcus epidermidis

Explanation: Erysipelothrix rhusiopathiae causes erysipeloid, a localized occupational skin infection acquired through wounds during handling of…

• A. Measure the nutritional value of feed
• B. Provide permanent immunity to livestock
• C. Replace laboratory confirmation of disease
• D. Detect pathogen circulation before human outbreaks

Explanation: Sentinel animals are monitored because infection or exposure in them can provide an early warning of pathogens circulating in an area.

• A. Prion
• B. Protozoan
• C. Helminth
• D. Gram negative bacterium

Explanation: Bovine spongiform encephalopathy is caused by an abnormal misfolded prion protein rather than a conventional microorganism.

• A. Metazoonosis
• B. Saprozoonosis
• C. Cyclozoonosis
• D. Amphixenosis

Explanation: A saprozoonosis involves an animal host and a nonanimal reservoir or developmental site, such as soil, water, or decaying organic matter.

• A. Neurological disease and dog bites
• B. Chronic arthritis and tick transmission
• C. Abortion storms and mosquito transmission
• D. Skin nodules and contaminated hides

Explanation: Rift Valley fever commonly causes severe abortion outbreaks and high mortality in young ruminants.

• A. Mycoplasma gallisepticum
• B. Chlamydia abortus
• C. Coxiella burnetii
• D. Chlamydia psittaci

Explanation: Chlamydia psittaci causes psittacosis, especially after exposure to infected birds and their dried droppings or respiratory secretions.

• A. Amplifying vertebrate hosts
• B. Dead-end vertebrate hosts
• C. Biological mosquito vectors
• D. Environmental fungal reservoirs

Explanation: Birds develop sufficient viraemia to infect mosquitoes, so they act as amplifying vertebrate hosts.

• A. Anthrax
• B. Foot-and-mouth disease
• C. Brucellosis
• D. Rabies

Explanation: Foot-and-mouth disease affects susceptible cloven-hoofed animals and is not regarded as a naturally transmitted human zoonosis.

• A. Metazoonosis
• B. Cyclozoonosis
• C. Direct zoonosis
• D. Saprozoonosis

Explanation: A direct zoonosis can pass between vertebrate hosts by direct contact, droplet spread, or contamination without essential multiplication…

• A. Handling intact wool after shearing
• B. Milking apparently healthy cows only
• C. Cleaning empty poultry houses
• D. Handling aborted fetuses and placental tissues

Explanation: Rift Valley fever virus is present at high levels in blood, aborted fetuses, placentas, and other tissues of infected animals.

• A. They provide an early warning of pathogen circulation
• B. They replace laboratory confirmation of human cases
• C. They permanently remove pathogens from vectors
• D. They are selected only for high meat production

Explanation: Sentinel animals are monitored because infection or seroconversion in them may reveal circulation of a pathogen before many human cases…

• A. Feeding birds raw offal to reduce shedding
• B. Improving ventilation and controlling dried fecal dust
• C. Using antibiotics in every exposed worker
• D. Vaccinating workers against rabies

Explanation: Chlamydia psittaci can spread when contaminated secretions or dried feces become airborne, so ventilation, wet cleaning, protective…

• A. Cooked eggs from healthy hens
• B. Pasteurized milk from vaccinated cattle
• C. Raw or undercooked pork from infected pigs
• D. Properly frozen fish from clean waters

Explanation: Brucella suis is associated mainly with pigs and can infect people through contact with infected tissues or consumption of inadequately…

• A. Removal of stray livestock from city areas
• B. Routine vaccination of all domestic cats
• C. Treatment of infected dogs with antibiotics
• D. Annual mass vaccination of domestic dogs

Explanation: Vaccinating a high proportion of domestic dogs interrupts transmission within the main urban reservoir population.