A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism ?
(A) Bile solubility
(B) Optochin sensitivity
(C) Bacitracin sensitivity
(D) Cataslase positive
The Manufacturing unit of surgical needle & sutures are sterilized by ________________?
(A) Gamma-Rays
(B) X-Rays
(C) Autoclaving
(D) Boiling
Bacterial cell does not possess___________________?
(A) dna
(B) Ribosome
(C) Mitochondria
(D) Cell wall
Post streptococcal acute glomerulo nephritis is an example of________________?
(A) Type I hypersensitivity
(B) Type II hypersensitivity
(C) Type III hypersensitivity
(D) Type IV hypersensitivity
The Process of attenuation can be achieved by all except___________________?
(A) Growing bacteria in adverse environment
(B) Growing bacteria in unconventional host
(C) Serial passage in an experimental host
(D) Repeated cultures in artificial media
Type IV hypersensitivity reaction is mediated by which of the following________________?
(A) B-cells
(B) Active T cells
(C) NK cells
(D) Plasma cells
Grave’s disease is an example of type immunologic response_________________?
(A) Type I
(B) Type II
(C) Type III
(D) Type IV
IL-1 is produced by_________________?
(A) Helper T cells
(B) Helper B cells
(C) Monocytes
(D) Macrophages
CD4 cells recognize the antigens in association with_____________?
(A) MHC I
(B) MHC II
(C) MHC III
(D) B-cell receptor