Which test would be used to identify the specific strain of a pathogen affecting an animal?

Which test would be used to identify the specific strain of a pathogen affecting an animal?

• A. Gram Stain
• B. Culture Test
• C. Biopsy
• D. CBC

Answer: (B)

Identifying a specific pathogen strain requires growing the organism and examining it in detail. A culture test does exactly that: it isolates the pathogen on appropriate media so you can observe colony characteristics, run biochemical tests, and perform molecular or susceptibility analyses to distinguish among strains. Without culture, you only get a general identification or clues about the organism, not the precise strain. Gram staining, while useful for a quick initial guess about the organism’s type and shape, doesn’t differentiate strains. Biopsy yields tissue for histology to assess disease-causing changes, not to identify the exact strain. A CBC shows systemic and inflammatory responses, not the identity or strain of the pathogen.

Identifying a specific pathogen strain requires growing the organism and examining it in detail. A culture test does exactly that: it isolates the pathogen on appropriate media so you can observe colony characteristics, run biochemical tests, and perform molecular or susceptibility analyses to distinguish among strains. Without culture, you only get a general identification or clues about the organism, not the precise strain.

Gram staining, while useful for a quick initial guess about the organism’s type and shape, doesn’t differentiate strains. Biopsy yields tissue for histology to assess disease-causing changes, not to identify the exact strain. A CBC shows systemic and inflammatory responses, not the identity or strain of the pathogen.