Which bacterial substance is most closely associated with resistance of endospores to heat and desiccation?
Correct answer: B. Calcium dipicolinate
- A. Lipopolysaccharide
- B. Calcium dipicolinate
- C. Hyaluronic acid
- D. Teichoic acid
Explanation
Calcium dipicolinate, together with the dehydrated spore core, contributes substantially to the exceptional resistance of bacterial endospores. Lipopolysaccharide is an outer-membrane component of Gram-negative bacteria and is not a spore-protective substance.
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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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