Session 9 - travel related infections

Question 1

Which organism causes Typhoid fever?

Answer 1

Salmonella Typhi

Question 2

Virulence factors of Salmonella Typhi?

Answer 2

• survives gastric acid
• low infectious dose
• fimbriae adhere to ileal lymphoid tissue

Question 3

Where does Salmonella typhi enter the tissues?

Answer 3

Through lymphoid tissue (peyer’s patches) in the ileum

Question 4

Typhoid fever symptoms are largely not GI related. What are they?

Answer 4

fever
dry cough 
headache
GI symptoms
relative bradycardia

Question 5

Salmonella infections in the UK cause what?

Answer 5

Food poisoning

Question 6

How does Dengue fever present?

Answer 6

Widespread blanching pink rash
Fever
Muscle pain
Headache

Question 7

Why do you get low lymphocytes in Dengue fever?

Answer 7

often reduce in viral infections- dengue is an arbovirus

Question 8

What is an arbovirus?

Examples

Answer 8

Any virus transmitted by mosquitoes/ ticks
Zika virus
Dengue virus

Question 9

Positive serology for Dengue fever would find what in the blood?

Answer 9

IgM

only get IgG after eliminated

Question 10

What is myiasis?

Answer 10

fly lava infection

- tumbu/ bot fly lava

Question 11

What type of virus causes ebola?

Answer 11

filovirus- produces hemorrhaging

Question 12

Why should couples wait 6 months before trying to conceive after a holiday to the Caribbean?

Answer 12

Zika virus can be present in semen for up to 6 months