Cryptosporidium, Microsporidium, Isospora Flashcards Preview

Microbiology > Cryptosporidium, Microsporidium, Isospora > Flashcards

Flashcards in Cryptosporidium, Microsporidium, Isospora Deck (18):
0

What is cryptosporidium caused by?

Cryptosporidium parvum.

1

What is Cryptosporidium parvum?

A protozoan parasite.

2

How is Cryptosporidium parvum spread?

Oocysts shed in faeces therefore faecal-oral route.
*low-grade contamination Eg) recreational water

3

Characteristics of Cryptosporidium parvum oocysts?

Can survive for long periods in the environment.
Resists disinfection including chlorination.

4

What is Cryptosporidium parvum a cause of?

Mild self-limited Diarrhoea - immunocompetent
Persistent Diarrhoea - children in developing countries
Severe Diarrhoea - AIDS patients *50 stools a day

5

How to diagnose Cryptosporidium parvum?

See Oocysts in faeces.

6

How to avoid Cryptosporidium parvum?

Difficult to eliminate form water supplies due to resistence to disinfection.
AIDS sufferers to boil their water and avoid obvious sources of possible infection.

7

Treatment for Diarrhoea caused by Cryptosporidium parvum?

No totally effective treatment.
Supportive therapy > fluid + electrolyte replacement.
Antiretrovirals in immunodeficiency.

8

Causative organism of Isospora?

Isospora bell

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What does Isospora bell cause?

Severe/chronic Diarrhoea.

10

Which group of people does Isospora bell cause Diarrhoea in normally?

Immunocompromised.

11

How to diagnose Isospora bell?

See oocyts on faeces.
Auramine stains can be used.

12

Treatment for Isospora bell infection?

Co-trimoxazole.

13

What kind of organism is Isospora bell?

Similar to Cryptosporidium parvum. Parasitic protozoan.

14

What kind of organism is Microsporidium?

Related to fungi.

15

What does Microsporidium cause wand who are at risk?

Causes Diarrhoea and wasting in the immunocompromised (AIDS patients).

16

How to diagnose Microsporidium?

Oocysts in faeces on wet prep.

17

How to treat Microsporidium?

Albendazole.
Antiretrovirals to combat immunodeficiency.