6. Pe ptidoglycan is in the archea but not in some bacteria like mycoplasms 7. P

Question

6. Peptidoglycan is in the archea but not in some bacteria like mycoplasms

7. Penicillins interfere with cross bridges of peptidoglycan are thus are not bacteriostatic but bactericidal

8. West Nile is an ancient disease carried by Anopheline mosquitoes and can cause encephalitis, meningitis, meningoencephalitis, especially in elderly

9. Malaria is probably the greatest microbial disease in the history of the human race do to its mortality rate and steady prevalence over millenia

10. E. coli forms black to metallic green colonies on PEA agar.

11.Elephantiasis can be a complication of infection with microfilarial worms in the genus Wuchereria and Trichiuris, although it can have genetic or environmental causes

12. Ebola is killing lowland gorillas at an alarming rate, and is a danger to the human race

13. Hanta virus, Dengue, and Lassa fever are associated with rodent droppings

Explanation / Answer

Answering first four questions (according to the answering guidelines) as it is a multi-subpart question.

6. True. Peptidoglycan is a part of cell wall and is composed of sugars and amino acids which form a mesh like layer outside the plasma membrane of most of the bacteria. Since mycoplasma doesn't contain a cell wall, it also doesn't contain peptidoglycan.

7. True. Pencillin inhibits the formation of peptidoglycan cross-links and kill the bacteria. Therefore, they are bactericidal.

8. False. West nile is a group of diseases caused by West Nile virus which is carried by a culicine mosquito rather than anopheline. Cules mosquito is a prominent example of a carrier of this virus.

9. False. Malaria is not caused by a bacteria but a protozoa called from Plasmodium species. Therefore it is not microbial but protozoan in origin.

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