DAMS - LAST LOOK: Microbiology

LAST LOOK

Microbiology

LAST LOOK

Microbiology

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First Published 1999, Delhi Academy of Medical Sciences 2018 DAMS Publication

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The agents of human infectious diseases are bacteria, fungi (yeasts and molds), protozoa, helminths (worms), and viruses. Bacterial cells have a prokaryotic nucleus, whereas human, fungal, protozoan, and helminth cells have a eukaryotic nucleus. Viruses are not cells and do not have a nucleus.

All cells contain both DNA and RNA, whereas viruses contain either DNA or RNA, but not both.

Bacterial and fungal cells are surrounded by a rigid cell wall, whereas human, protozoan, and helminth cells have a flexible cell membrane.

The bacterial cell wall contains peptidoglycan, whereas the fungal cell wall contains chitin.

Comparison of Conjugation, Transduction, and Transformation

Bacterial diseases transmitted by insects:

Virulence Factors: