NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following microbial forms have the highest resistance to physical and chemical controls?
A
naked viruses
B
protozoan cysts
C
fungal spores
D
bacterial endospores
Explanation: 

Detailed explanation-1: -Endospores are considered the most resistant structure of microbes. They are resistant to most agents that would normally kill the vegetative cells they formed from.

Detailed explanation-2: -Except for prions, bacterial spores possess the highest innate resistance to chemical germicides, followed by coccidia (e.g., Cryptosporidium), mycobacteria (e.g., M.

Detailed explanation-3: -Prions are the most resistant to control measures, and enveloped viruses are the least resistant.

Detailed explanation-4: -A variety of different microorganisms form “spores” or “cysts", but the endospores of low G+C Gram-positive bacteria are by far the most resistant to harsh conditions.

Detailed explanation-5: -Different groups of bacteria vary in their susceptibility to biocides, with bacterial spores being the most resistant, followed by mycobacteria, then Gram-negative organisms, with cocci generally being the most sensitive.

There is 1 question to complete.