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Flashcards in microbiology Deck (166)
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1

how does strongyloides cause hyperinfection with gram negatives

when strongyloides pentrates through tissue walls --> go into circulation (can bring gram negative organisms with it into the blood) = sepsis

2

what is the proper name for worms

helminths

3

what is a paratenic host

host in which the parasite enters the body and does not undergo development, but remains infective (does not change into different parts of its life cycle)

3

what are the two main ways of catching toxoplasma gondii

- from cats faeces - undercooked meat

4

Who does Giardia classically infect

children - poor hand hygiene

4

symptoms of enterobius ermicularis

many asymptomatic perianal/vaginal itch

4

what are the 2 types of taeniasis

taenia saginate taenia doium

5

What is pathotyping mainly used for?

determining which virulence type it is - for E coli

5

what does echinococcus granulosus cause

hydatid cysts

6

why are type 3 secretion systems special

because it is used by pathogens to make a protein go directly from the cytoplasm of the bacteria to the cytoplasm of the host cell

7

What type of diarrhoea does EHEC cause? Which population is mostly affected?

- bloody diarrhoea - any age, developed coutries

8

life cycle of enterobius ermicularis

eggs ingested by humans --> hatch --> at night, females will crawl out and lay eggs around the anus and then go back in during the day --> itch --> hand in mouth

9

what are the aetiological agents of travellers' diarrhoea

ETEC other bacteria viruses protozoa

9

2 types of parasites

ectoparasites protozoal parasites

9

treatment of scabies

- ivermentin - oral - topical scabicides (need to be over long time period) - hot wash clothes and bed linen

9

what kind of helminth is strongyloides stercoralis

roundworm

10

Main food source of Salmenella

raw eggs

11

what is the difference between a definitive host and an intermediate host

definitive - parasite reaches sexual maturity in the host intermediate - development occurs but the parasite does not reach sexual maturity

12

proper name for ticks

Ixodes holocyclus

12

two main forms of protozoa

trophozoite - active cysts - inactive

13

definition of haemorrhagic colitis

inflammation of the colon --> blood in the faeces (but no pus)

13

life cycle of scabies

burrow into the epidermis --> come out to lay their eggs on the surface --> eggs hatch --> burrow into epidermis

14

infection by lice is known as

pediculosis

14

how long is taeniasis

up to 10m long

15

how much fluid goes into the GIT in 24 hours and how much is excreted

10 Litres goes in 100ml comes out

17

how does staph cause food poisoning

eat the pre formed toxin in food

18

what are the aetiological agents of food bourne gastro

Staph Salmenella Clostridium Bacillus Vibrio Listeria viruses ciguatoxin

18

Which E coli use the Type 3 secretion system

EPEC and EHEC

18

what is the helminth that is able to complete its life cycle in the human

strogyloides

19

3 major types of helminths

roundworms (nematodes) tapeworms flukes