A. Readily inactivated by autoclave at 121 C
B. Evokes strong immunogenic reaction
C. Sensitive to most chemical sterilization
D. Contains DNA/ RNA
✅ The correct answer is option Readily inactivated by autoclave at 121 C.
Microbiology
All are true about bordetella pertussis except______________?
A. Most common cause is B. Petrussis
B. It may occur in children and young adult after vaccination
C. Bacteria culture from nasopharyngeal swab is the definitive diagnosis
D. Presence of antibodies in serum in diagnostic of the disease
✅ The correct answer is option Presence of antibodies in serum in diagnostic of the disease.
Cell wall deficient bacteria are_______________?
A. Escherichia Coli
B. Staphylococci
C. Spirochetes
D. Mycoplasma
✅ The correct answer is option Mycoplasma.
Bacteria with potent exotoxin is_______________?
A. Clostridium tetani
B. Pseudomonas
C. Shigella
D. Klebsiella
✅ The correct answer is option Clostridium tetani.
Most of the drug resistances occurs due to_____________?
A. Transduction
B. Transformation
C. Mutation
D. conjugation
✅ The correct answer is option conjugation.
Disinfection of the rooms can be done by using_______________?
A. 20% phenol
B. High efficiency particle arrestors
C. 40% formaldehyde vapour
D. Chlorine gas
✅ The correct answer is option 40% formaldehyde vapour.
An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics which of the following organisms is it likely to be ?
A. Escherichia coli
B. Klebsiella pnemoniae
C. Proteus miribilis
D. Pseudomonas aeruginosa
✅ The correct answer is option Pseudomonas aeruginosa.
The medium of choice for growing most fungi is_______________?
A. Blood agar
B. Tissue culture
C. Sabouraud’s agar
D. Thioglycollate medium
✅ The correct answer is option Sabouraud’s agar.
The following is not true of Candida albicans______________?
A. Yeast like fungus
B. Forms Chlamydospores
C. Blastomeres seen in isolates
D. Seen in immunocompromised and causes meningitis in them
✅ The correct answer is option Blastomeres seen in isolates.
Culture medium used for Bordatella pertussis is_________________?
A. Wilson Blair medium
B. Bile broth
C. Bordet Gengou medium
D. Robertson cooked meat medium
✅ The correct answer is option Bordet Gengou medium.