Chapter 11, Problem 20MIC

Bacteria of the genus Mycoplasma are distinguished from other bacterial cells by 1) cell walls composed solely of amino acids. O 2) the absence of a cytoplasmic membrane. O 3) the absence of a cell wall. O 4) Have large capsules. 5) the presence of mycolic acid in their cell walls.

What are the common pathogens isolated from stool samples? What is the difference between a coliform bacterium and a noncoliform enteric bacterium? What diagnostic test differentiates Proteus and Providencia species from other Enterobacteriaceae? How would you differentiate between serotypes of E. coli? Are the gram-negative enteric bacilli fastidious organisms? Would they survive well outside of the body? If so, what significance would this have in their transmission? Why is serotyping particularly important in Salmonella infections and typhoid fever?

What kind of bacteria Bacillus subtilis and what enviroments does it thrive in and why?

Which area of the body has the most diverse bacterial flora: the skin, nose, or throat? What features of this area encourage diversity?

Propionibacterium acnes is a normal member of the skin microbiome that benefits the body by lowering the skin's pH- an antimicrobial effect. However, P. acnes is also the leading cause of acne. Explain mechanistically how can a bacterium be normal and beneficial but also be pathogenic?

There are different types of bacteria classify them based on following: i. Shapes ii. gram stain iii. oxygen demand iv. mode of nutrition

What makes bacterial diseases such as Clostridium botulinum, Clostridium perfringens & Clostridium tetani very effective to cause infection in a human host?

Name the bacterium which causes citrus canker.

All of the following pertain to archaeobacteria EXCEPT:(a) They include microbes that live in hot acidic environ-ments.(b) All are strict anaerobes.(c) They include microbes that live in extremely saltyenvironments.(d) All lack peptidoglycan in their cell walls.(e) They include microbes that reduce carbon to methanegas.