Chain of infection & categories of infectious disease agents
11 important questions on Chain of infection & categories of infectious disease agents
What is the life cycle of trichinella spiralis?
2. Larvae (L1) in human
3. Maturation of larvae in small intestine
4. Reproduction
5. New larvae again in muscles in Nurse cells.
What is the life cycle of hookworm?
1. Going through the skin (by walking barefoot); via teeth of the hookworm.
2. Go via the blood vessels to the heart and lungs.=> ophoesten => digestive tract
3. Maturing in the wall; steal your nutrients
4. Faecel in soil
Hygiene is really important
How long does it take for a hookworm larvae to generate new infective larvae? And how long can the worm live in our body?
years.
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What are symptoms of hookworm?
Retarded mental and physical development by children if not treated.
Which drug is availible?
What determines the symptoms of schistosomiasis?
They can be in the liver, intestines, spleen, urinary tract and reproductive system.
What are the three types of schistosomiasis that cause infection in human?
S. Haematobium: urogenital
S. Japonicum: intestinal
What is the pathology of schistosomiasis?
2. The blood vessels erode
3. Irritation of the blood vessels => abscess and fibrosis around eggs => different inflammatory changes.
4. Itching at the side of enterance of the body
5. Hepatitis, dearrhoea, anaemia and eosinophilia => depends of where the eggs are.
What do we make as a reaction against schistosome eggs?
They lay around the parasites.
Granuloma itself is causing pathology in the host.
What is the epidemiology of schistomiasis?
Neglected tropical diseases
Sub-Saharan Africa
What are fungi? Name two examples.
Very difficult to treat.
- Histoplasmosis: inhaling dust from soil. Bird droppings in the soil.
- Candidiasis:
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