Travel Related Infections Flashcards
1
Q
Rickettsia
A
Gram negative
Cocci and bacilli
2
Q
Spirochaete
A
Spiral shaped
Cause syphilis
3
Q
Acute infection
A
Less than 10 days
4
Q
Sub acute infection
A
Presentation 10 - 21 days after exposure
5
Q
Chronic
A
More than 21 days
6
Q
Insect tick bite
A
Malaria
Dengue
Rickettsia
7
Q
Contaminated food or water
A
Brucellosis
Salmonella
8
Q
5 main species of plasmodium
A
Falciparum - Africa Vivax - India Ovale - India Malariae Knowlessii
9
Q
Incubation for malaria
A
Bitten 1 week ago
10
Q
Presentation of malaria
A
Fever
Chills
Sweats
Cycle every 3rd/4th day
11
Q
Mechanism of malaria
A
- Sporozites from the mosquito enter human blood
- Invade hepatocytes
- Form schizonts which multiply and mature into merozoites
- Lyase hepatocytes releasing merozoites systemically
- Invade and lyse RBCs
- Some merozoites become gametocytes which remain in the blood stream for several days and infect other mosquitos
12
Q
Why is travel history important
A
Different strains of pathogen are:
- antigenically different
- impacts on protection and detection
- antibiotic resistance
13
Q
Risk factor for histoplasmosis
A
Caves
14
Q
Myiasis
A
Fly larva from bot fly invades
