Veterinary Microbiology Practice Test- MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. Which staining technique is used to differentiate bacteria into Gram-positive and Gram-negative? (A) ZiehlâNeelsen stain (B) Gram stain (C) Giemsa stain (D) Leishman stain 2. The causative agent of anthrax is: (A) Clostridium tetani (B) Bacillus anthracis (C) Pasteurella multocida (D) Listeria monocytogenes 3. Which bacteria cause tuberculosis in cattle? (A) Mycobacterium bovis (B) Mycobacterium avium (C) Mycobacterium tuberculosis (D) Mycobacterium leprae 4. The term âacid-fastâ is primarily used for: (A) Bacillus species (B) Staphylococcus species (C) Mycobacterium species (D) Escherichia species 5. Which structure is responsible for bacterial motility? (A) Capsule (B) Pili (C) Flagella (D) Ribosomes 6. Which bacteria are commonly associated with mastitis in dairy cattle? (A) Streptococcus agalactiae (B) Staphylococcus aureus (C) Escherichia coli (D) All of the above 7. The causative agent of brucellosis in cattle is: (A) Brucella melitensis (B) Brucella abortus (C) Brucella suis (D) Brucella canis 8. The ZiehlâNeelsen staining method is used to detect: (A) Gram-negative bacteria (B) Acid-fast bacteria (C) Fungal spores (D) Protozoa 9. Which of the following is an example of a spore-forming bacteria? (A) Mycoplasma (B) Clostridium (C) Pasteurella (D) Bordetella 10. The causative agent of Black Quarter (BQ) disease is: (A) Clostridium septicum (B) Clostridium chauvoei (C) Clostridium novyi (D) Clostridium perfringens 11. Which bacteria cause Johneâs disease in cattle? (A) Mycobacterium paratuberculosis (B) Mycobacterium bovis (C) Brucella abortus (D) Listeria monocytogenes 12. The primary vector for Lyme disease in animals is: (A) Mosquito (B) Tick (C) Flea (D) Louse 13. Which medium is selective for the growth of Mycobacterium tuberculosis complex? (A) MacConkey agar (B) Blood agar (C) LowensteinâJensen medium (D) Nutrient agar 14. Which bacterial structure protects against phagocytosis? (A) Cell wall (B) Flagella (C) Capsule (D) Fimbriae 15. The causative agent of contagious bovine pleuropneumonia (CBPP) is: (A) Pasteurella multocida (B) Mycoplasma mycoides (C) Actinomyces bovis (D) Haemophilus somnus 16. Which bacteria cause listeriosis in animals? (A) Clostridium botulinum (B) Listeria monocytogenes (C) Bacillus anthracis (D) Corynebacterium pseudotuberculosis 17. Which bacterial toxin causes botulism? (A) Endotoxin (B) Exotoxin (C) Neurotoxin (D) Enterotoxin 18. The causative agent of caseous lymphadenitis in sheep is: (A) Actinobacillus lignieresii (B) Corynebacterium pseudotuberculosis (C) Pasteurella multocida (D) Mycobacterium avium 19. Which bacteria cause swine erysipelas? (A) Erysipelothrix rhusiopathiae (B) Brucella suis (C) Pasteurella multocida (D) Salmonella typhimurium 20. The âclumping factorâ test is used to identify: (A) Escherichia coli (B) Staphylococcus aureus (C) Salmonella species (D) Pseudomonas aeruginosa 21. The causative agent of salmonellosis in animals is: (A) Salmonella enterica (B) Escherichia coli (C) Shigella dysenteriae (D) Vibrio cholerae 22. Which staining technique is used to identify bacterial capsules? (A) Gram staining (B) Negative staining (C) ZiehlâNeelsen stain (D) Giemsa stain 23. The causative agent of strangles in horses is: (A) Streptococcus equi (B) Staphylococcus aureus (C) Bordetella bronchiseptica (D) Escherichia coli 24. The term âfastidious bacteriaâ refers to organisms that: (A) Grow rapidly on simple media (B) Require complex growth factors (C) Do not require nutrients (D) Are resistant to antibiotics 25. Which bacterial species is used in yogurt production? (A) Lactobacillus bulgaricus (B) Streptococcus pyogenes (C) Bacillus anthracis (D) Clostridium perfringens 26. The causative agent of foot rot in sheep is: (A) Fusobacterium necrophorum (B) Pasteurella haemolytica (C) Actinobacillus pleuropneumoniae (D) Brucella ovis 27. Which bacteria produce enterotoxins causing food poisoning? (A) Salmonella (B) Staphylococcus aureus (C) Clostridium perfringens (D) Both B and C 28. The causative agent of Glanders in equines is: (A) Burkholderia pseudomallei (B) Burkholderia mallei (C) Bacillus cereus (D) Clostridium botulinum 29. Which bacteria are used as probiotics in animal feed? (A) Escherichia coli (B) Lactobacillus species (C) Salmonella species (D) Pseudomonas species 30. The causative agent of leptospirosis in cattle is: (A) Leptospira interrogans (B) Treponema pallidum (C) Borrelia burgdorferi (D) Campylobacter fetus 31. Which bacteria cause actinomycosis (âlumpy jawâ) in cattle? (A) Actinomyces bovis (B) Nocardia asteroides (C) Corynebacterium renale (D) Mycobacterium avium 32. What is the shape of Vibrio bacteria? (A) Cocci (B) Rods (C) Comma-shaped (D) Spirals 33. Which bacteria cause melioidosis in animals? (A) Burkholderia pseudomallei (B) Burkholderia mallei (C) Bacillus anthracis (D) Escherichia coli 34. The causative agent of fowl cholera is: (A) Salmonella gallinarum (B) Pasteurella multocida (C) Escherichia coli (D) Clostridium perfringens 35. Which bacteria are acid-fast but non-pathogenic in soil? (A) Mycobacterium smegmatis (B) Mycobacterium leprae (C) Mycobacterium bovis (D) Mycobacterium avium 36. The causative agent of Q fever is: (A) Coxiella burnetii (B) Rickettsia rickettsii (C) Bartonella henselae (D) Chlamydia psittaci 37. The causative agent of botryomycosis in animals is: (A) Staphylococcus aureus (B) Actinobacillus lignieresii (C) Nocardia asteroides (D) Pseudomonas aeruginosa 38. Which bacteria cause tularemia in animals? (A) Francisella tularensis (B) Yersinia pestis (C) Pasteurella multocida (D) Bartonella henselae 39. The main causative agent of atrophic rhinitis in pigs is: (A) Bordetella bronchiseptica (B) Pasteurella multocida (C) Actinobacillus pleuropneumoniae (D) Escherichia coli 40. The causative agent of contagious caprine pleuropneumonia is: (A) Mycoplasma capricolum (B) Mycoplasma mycoides subsp. capri (C) Mycoplasma bovis (D) Mycoplasma hyopneumoniae 41. The âacid-fastnessâ of Mycobacteria is due to: (A) Peptidoglycan (B) Lipopolysaccharide (C) Mycolic acid (D) Teichoic acid 42. Which bacteria cause wooden tongue in cattle? (A) Actinobacillus lignieresii (B) Actinomyces bovis (C) Corynebacterium renale (D) Nocardia asteroides 43. The causative agent of fowl typhoid is: (A) Salmonella pullorum (B) Salmonella gallinarum (C) Escherichia coli (D) Pasteurella multocida 44. Which bacteria are responsible for pink eye in cattle? (A) Moraxella bovis (B) Mycoplasma bovis (C) Escherichia coli (D) Pasteurella haemolytica 45. The causative agent of contagious agalactia in sheep and goats is: (A) Mycoplasma agalactiae (B) Brucella melitensis (C) Pasteurella multocida (D) Corynebacterium pseudotuberculosis 46. Which bacteria cause Q fever abortions in cattle? (A) Brucella abortus (B) Coxiella burnetii (C) Listeria monocytogenes (D) Salmonella dublin 47. The causative agent of shipping fever in cattle is: (A) Mannheimia haemolytica (B) Pasteurella multocida (C) Haemophilus somnus (D) All of the above 48. Which bacteria cause Glässerâs disease in pigs? (A) Actinobacillus suis (B) Haemophilus parasuis (C) Pasteurella multocida (D) Bordetella bronchiseptica 49. The causative agent of tetanus is: (A) Clostridium tetani (B) Clostridium botulinum (C) Clostridium chauvoei (D) Clostridium septicum 50. The causative agent of mastitis known as âsummer mastitisâ is: (A) Trueperella pyogenes (B) Staphylococcus aureus (C) Streptococcus agalactiae (D) Escherichia coli Basic & Pre-Clinical Subjects (MCQs) Anatomy MCQs Histology MCQs Physiology MCQs Biochemistry MCQs Animal Genetics & Breeding MCQs Livestock Production & Management MCQs Animal Nutrition MCQs Veterinary Microbiology MCQs Veterinary Parasitology MCQs Veterinary Pathology MCQs Clinical Sciences (MCQs) Veterinary Medicine MCQs Veterinary Surgery & Radiology MCQs Veterinary Gynaecology & Obstetrics MCQs Veterinary Pharmacology & Toxicology MCQ s Veterinary Anaesthesiology MCQs Veterinary Clinical Pathology MCQs Preventive & Public Health (MCQs) Veterinary Epidemiology MCQs Veterinary Public Health MCQs Veterinary Preventive Medicine MCQs Veterinary Ethics & Jurisprudence MCQs Specialized & Allied Subjects (MCQs) Poultry Science MCQs Aquatic Animal Health MCQs Wildlife Health & Management MCQs Veterinary Biotechnology MCQs Veterinary Extension Education MCQs Veterinary Economics & Business Management MCQs