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18 Cards in this Set
- Front
- Back
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Yellow fever is a disease caused by? |
An arthropod-borne ( ARBO) virus |
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Yellow fever is endemic in? |
Tropical Africa and South America. Where occasionally, it occurs as an epidemic |
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Which age group is affected by yellow fever 🤒 |
All age group |
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First case of yellow fever in Nigeria? And since then? |
1913 There have been at least 10 severe epidemics of yellow fever in Nigeria |
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Yellow fever is ..... In African monkeys , although? |
Enzootic... Although they don't suffer recognizable disease |
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Thus, yellow fever is maintained in Africa by? |
1. Monkeys 2. The wild mosquitoes - aedes mosquitoes which breeds and bites animals in the forest |
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Yellow fever is transmitted by |
Different genera of mosquitoes |
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Aedes mosquitoes are involved in |
The transmission of jungle yellow fever ( yellow fever in the forest) In Africa |
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In South American? Which spece of mosquitoes |
Haemagogus |
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Explain the link-host concept |
Sometimes, aedes simpsoni , which breeds in banana tree acils near the forest bite infected monkey when the monkey come from the forest to raid plantations. The aedes simpsoni may thereafter bite man and the infection is transmitted to man, and is thus called link host |
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Example of other link host in West Africa |
1. Aedes furcifer - Taylori .. 2. Aedes luteocephalus |
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If a person is bitten by...... an outbreak may occur in the human population. |
Aedes Aegypti |
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...... is thus maintained by man to man transmission by aedes aegypti |
Urban yellow fever |
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Once a mosquito become infective after ...... , they..... |
1. After biting an infected person or monkey 2. They remain infective for the rest of their lives |
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Symptoms of yellow fever 🤒 |
1. There are many inapparent infections leading to immunity without overt illness 2. After an incubation period of 3 to 6 days, 3.most clinically recognizable cases may begin with a sudden attack of fever , headache, generalized aches and pains ➕ abd. Pain, nausea +/- vomiting, weakness, prostration 4. May be followed by improvement in general condition of the patient before the final phase of the disease - jaundice, instead severe cases - bleeding from gums, epistaxis, haematemesis, Melana , internal haemorrhage 5. Oliguria and albuminuria are common |
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Control of yellow fever 🤒 |
1. Protection of susceptible person - vaccination 17D vaccine, immunity effective after 10 days 2. Reduction of vectors 3. Personal protection 4. Epidemiological surveillance |
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Best time for spraying insecticides for aedes mosquitoes |
Late afternoon... Between 5pm and 7.45pm |
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How many diseases are subject to international health regulations? List them |
4 diseases 1. Yellow fever 🤒 2. Plague 3. Small pox 4. Cholera |
