Which complement component acts as an important opsonin by coating microbial surfaces?
Correct answer: B. C3b
- A. C1q
- B. C3b
- C. C5a
- D. C9
Explanation
C3b binds to microbial surfaces and promotes their recognition and phagocytosis by immune cells. C5a mainly attracts and activates leukocytes, while C9 contributes to membrane pore formation.
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About Veterinary Microbiology and Immunology
Covers the structure, classification, growth and transmission of bacteria, viruses, fungi and other disease causing microorganisms in animals. It explains innate and acquired immunity, antibodies, antigens, vaccination, hypersensitivity and diagnostic methods, while distinguishing infectious agents from the immune responses they produce.
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