BCSE BCSE - Basic and Clinical Sciences Examination Veterinary Microbiology and Infectious Diseases Questions and Answers 2

Question 1

Which antifungal mechanism of action does amphotericin B use to kill fungal cells?

Accepted Answer

Binds ergosterol, forming pores that disrupt membrane integrity

Answer

Inhibits beta-glucan synthase in the cell wall

Answer

Inhibits lanosterol 14-alpha-demethylase

Answer

Blocks fungal DNA gyrase

Question 2

Dermatophytosis in cats is most commonly caused by which organism?

Accepted Answer

Microsporum canis

Answer

Trichophyton mentagrophytes

Answer

Microsporum gypseum

Answer

Candida albicans

Question 3

Which virus causes Marek's disease in poultry and belongs to which family?

Accepted Answer

Gallid herpesvirus 2, family Herpesviridae

Answer

Avian leukosis virus, family Retroviridae

Answer

Newcastle disease virus, family Paramyxoviridae

Answer

Infectious bursal disease virus, family Birnaviridae

Question 4

The zoonotic bacterium Francisella tularensis is most commonly transmitted to humans through which route?

Accepted Answer

Arthropod bites (ticks, deer flies) or contact with infected rabbit tissues

Answer

Fecal-oral contamination from cattle

Answer

Inhalation of bat guano

Answer

Ingestion of undercooked pork

Question 5

Which serologic test is used as the official screening test for brucellosis in US cattle?

Accepted Answer

Rose Bengal plate test (RBPT) or buffered Brucella antigen test

Answer

Complement fixation test only

Answer

PCR on whole blood

Answer

Milk ring test only

Question 6

West Nile virus in horses produces encephalomyelitis and is transmitted primarily by which vector?

Accepted Answer

Culex mosquitoes

Answer

Ixodes ticks

Answer

Simulium black flies

Answer

Culicoides midges