VMC-0020
QUESTION
H.S. organism remains in carrier animal in?
OPTIONS
(A) Tonsil
(B) Nasopharynx
(C) Larynx
(D) All of the above
ANSWER
(A) Tonsil
EXPLANATION
Carrier cattle infected with Pasteurella multocida associated with hemorrhagic septicemia commonly harbor the organism in the upper respiratory tract, particularly the tonsillar region. Hence option A is correct; although the organism may be recovered from other upper-airway sites, the tonsil is the classic carrier site emphasized in veterinary microbiology.
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