ICAR AICE-JRF/SRF (PhD) · India · NTA for ICAR
Original practice questions written to the published syllabus · not past papersThe bacterial and related infectious diseases of livestock and horses: clinical signs, diagnosis, treatment, prevention and control.
In the exams: ICAR AICE-JRF core group 07 (Medicine); ICAR AIEEA-PG 13; China infectious diseases 30; TNPSC Micro/VPH/Preventive Medicine 30
ICAR AICE-JRF/SRF (PhD) — core group 07 (Medicine)
Pathogenesis in more depth (tetanospasmin mechanism, epsilon toxin, erythritol, inverse age resistance in anaplasmosis), interpretation of tuberculin and serological tests, rationale for not treating CBPP and glanders, and national control programmes.
How our questions for ICAR AICE-JRF/SRF spread across the units of Preventive Veterinary Medicine I: Bacterial, Fungal, Rickettsial and Mycoplasmal Diseases. Difficulty: 17 easy, 25 medium, 17 hard.
| Brucellosis | 7 | |
| Haemorrhagic septicaemia | 5 | |
| Tuberculosis | 5 | |
| Mycoplasmal diseases: CBPP and CCPP | 5 | |
| Clostridial diseases: black quarter, enterotoxaemia and tetanus | 4 | |
| Anthrax | 4 | |
| Johne's disease | 4 | |
| Anaplasmosis | 4 | |
| Caseous lymphadenitis | 3 | |
| Listeriosis | 3 | |
| Leptospirosis | 3 | |
| Glanders | 3 | |
| Actinomycosis and actinobacillosis | 3 | |
| Ringworm | 3 | |
| Mastitis | 2 | |
| Strangles | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
The major virulence factor of Corynebacterium pseudotuberculosis is:
C. Phospholipase D
Phospholipase D is an exotoxin that increases vascular permeability and aids spread; it is the basis of CLA toxoid vaccines and serological tests. Epsilon toxin belongs to C. perfringens type D; protective antigen to B. anthracis.
Under the current seven-type scheme, necrotic enteritis of broiler chickens is associated with Clostridium perfringens type:
D. G, producing NetB
Since the 2018 revision, strains producing NetB are type G, and these cause avian necrotic enteritis. Older texts attribute it to type A, which is the common exam trap. Type F (alpha plus enterotoxin) causes human food poisoning.
Which species is most susceptible to haemorrhagic septicaemia?
D. Water buffalo
Buffalo are more susceptible than cattle, and mortality in unvaccinated buffalo is very high. Sheep, pigs and horses are only occasionally affected.
The maintenance host for Leptospira serovar Hardjo is:
C. Cattle
Cattle maintain Hardjo, often with chronic renal and genital infection. Pigs maintain Pomona and Bratislava, dogs Canicola, and rats Icterohaemorrhagiae and Copenhageni.
The reference serological test for leptospirosis is:
B. Microscopic agglutination test
The MAT uses live leptospires of a panel of serovars and is the reference test. The Rose Bengal plate test and milk ring test are for brucellosis.
RB51 vaccine is useful in eradication programmes because it:
B. Lacks O-polysaccharide, so it induces no antibodies detected by standard serological tests
RB51 is a rough mutant without O-chain, so vaccinated animals remain negative on RBPT, CFT and similar tests. It is live and infectious for people and is rifampicin-resistant, which matters for treating accidental exposure.
The gross lesions of avian tuberculosis in chickens are found mainly in the:
A. Liver, spleen and intestine
M. avium subsp. avium spreads by the oral route and causes tubercles in the liver, spleen, intestine and bone marrow of older birds; lungs are much less affected than in bovine TB.
Regarding glanders, which is correct?
D. Donkeys and mules tend to develop acute disease, while horses often become chronically infected carriers
Donkeys and mules usually die of acute disease; horses more often have chronic infection and are the long-term carriers. B. mallei is an obligate mammalian pathogen that survives only briefly in the environment.
Which statement about live Anaplasma centrale vaccine is correct?
C. Used in Australia, South Africa, Israel and South America, it can carry other blood-borne agents and cause reactions in adults
A. centrale blood vaccines give protection against severe disease, not infection, and being blood-derived they risk carrying other pathogens; reactions are more likely in older cattle. They are not permitted in many countries, including the United States.
Anaplasma phagocytophilum causes which condition in sheep?
C. Tick-borne fever
A. phagocytophilum infects granulocytes and causes tick-borne fever in sheep and cattle, with immunosuppression. Heartwater is Ehrlichia ruminantium; redwater is babesiosis; louping ill is viral.
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