Microbial Classification Flashcards Preview

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Flashcards in Microbial Classification Deck (20):
1

What 4 classes of microorganisms are there?

-bacteria
-viruses
-fungi
-parasites

2

what size are the following:

-smallest size seen by unaided human eye
-protozoa/fungi
-bacteria
-viruses

eye: 40 um

protozoa/fungi: 4-40 um

bacteria:0.1-10 um

viruses: 0.03-0.3 um

3

Describe the following:
-strict aerobes
-facultative anaerobes
-microaerophilic
-aerotolerant
-strict anaerobes

-strict aerobes: solely depend on aerobic respiration

-facultative anaerobes: can use either aeorobic or anaerobic metabolism

-microaerophilic: depends on aerobic respiration but killed by too much oxygen

-aertolerant: uses anaerobic fermentation but can survive in oxygen

-strict anaerobes: anaerobic metabolism, killed by oxygen

4

List the aerobic gram + cocci we need to know:

-Staphylococcus spp.
-Streptococcus spp.
-Enterococcus spp.

5

List the 2 aerobic and 1 anaerobic gram + bacilli we need to know:

O2:
Corynebacterium spp.
Bacillus spp.

AnO2:
Clostridium spp.

6

List the 2 gram negative aerobic cocci we need to know:

-Neisseria spp.
-Haemophilus spp. (coccobacilli)

7

List the 1 aerobic and 1 anaerobic gram negative bacilli we need to know:

O2:
-E. coli

AnO2:
Bacteroides spp.

8

List 3 intracellular types of bacteria?

-Chlamydia spp.
-Chlamydophila spp.
-Rickettsia

9

What bacterium lacks a rigid cell wall?

Mycoplasma spp.

10

List 2 acid-fast/partially acid-fast bacteria:

-Mycobacterium spp.
-Nocardia spp.

11

List 2 types of spirochetes:

-Treponema pallidum
-Leptospira spp.

12

What are the classification criteria for viruses?

-DNA vs RNA
-single stranded vs. double stranded vs. segmented
-envelope/none
-shape of capsid: icosohedral (20 faces), helical, complex

13

List the 2 DNA viruses you must know:

List the 5 RNA viruses you must know:

DNA:
-Hepatitis B
-Herpesvirus

RNA:
-Hepatitis A,C,E
-Influenza A, B
-HIV
-Rotavirus
-Norovirus

14

What are the two major classes of fungi?

-filamentous fungi=moulds
(multi-cellular, hyphae collectively= mycelium)

-yeast (single cell, ovoid/sphere)

15

What type of yeast must you know (you'll see this a lot in practice):

Candida spp.

16

What are the two classes of parasites?

-protozoa

-helminths

17

What are the categories by which protozoa are divided?

-amoebae
-ciliates
-flagellates
-coccidia
-microsporidia
-sporozoa

*also divided by site of infx

18

What are the categories of helminths?

-nematodes (round worms)
-cestodes (flat worms)
-trematodes (flukes)

*also divided by site of infx

19

List the protozoa we need to know:

-Entamoeba histolytica (intestinal)
-Giardia lamblia (intestinal)
-Plasmodium spp. (blood)
-Toxoplasma gondii (other)
-Acanthamoeba spp. (other)

20

List the helminths you must know:

-Ascaris lumbricoides (intestinal)
-Taenia spp. (intestinal)
-Schistosoma spp. (blood)
-Eichinococcus spp. (other)