L9- Intro to Microbiology Flashcards Preview

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Flashcards in L9- Intro to Microbiology Deck (19):
1

What are the 4 of Koch's Postulates (need to know?)

The causative organism must be isolated from every individual suffering from the disease in question;

The causative organism must be cultivated artificially in pure culture;

When the causative organism is inoculated from pure culture, the typical symptoms of the infection must result;

The causative organism must be recoverable from individuals who are infected experimentally.

2

What covers the nucleic core of viruses?

Capsomeres (like a coat around the core)

3

What is the special class of virus that attacks bacteria?

Bacteriophage

4

spongiform encephalopathies are caused by ?

Infectious proteins known as prions.

5

Are fungi Eukaryote or prokaryote?

All fungi are eukaryotic.

Most possess a cell wall made of chitin.

6

What are moulds?

fungi that grow in mats of tiny filaments known as hyphae that form mats called mycelia

7

Example of a unicellular fungi

Yeast

8

Are moulds multicellular or unicellular

Multicellular

9

What conditions are caused by moulds?

Ring worm
Athletes foot

10

What condition is caused by yeast?

Thrush
Caused by candida albicans

11

Features of Protista/Protozoa

Protists are unicellular eukaryotes

12

Examples of conditions caused by Protists/Protozoa

toxoplasmosis,
amoebic meningitis,
malaria,
trypanosomiasis,
leishmaniasis (Kala-Azar)
amoebic dysentery
diarrhoea

13

Trichomonas vaginalis causes

Foul smelling Vaginal discharge

Men can be asymptomatic carriers, although this protist can cause balanitis.

14

Gram positive vs Gram negative

Gram positive:
Lots of layers of peptidoglycan

Gram Negative:
-The outer membrane contains lipopolysaccharide.
-The sugars form surface antigen + complex lipid = lipid A, ---> acts as endotoxin, responsible for the symptoms of Gram-negative shock
-hair-like structures known as fimbriae

15

What are Fimbriae?

Hair like structures aid adhesion onto particular surfaces

16

Streptococcus mutans and teeth relationship?

Slime produced by it sticks to the teeth ---> Helps form plaque ---> eventually leading to caries

17

Infections by faecal-oral route examples

Typhoid
cholera
dysentery
hepatitis A
poliomyelitis

18

Term for a disease which can be transmitted to humans from animals

Zoonoses

19

What is a fomite?

any object or substance capable of carrying infectious organisms