Onchocerciasis (River Blindness)
Is a disease that is caused by a worm which breeds near fast flowing rivers. Its larvae are spread by black flies when it bites humans. Often it can infect areas leaving ghost villages, which are often found near fertile land. Travellers are at low risk of the disease unless you are staying or living in an endemic area for more than 3 months are at greater risk of infection.
Risk areas:
Is most commonly found in parts of central Africa, although can also be found in the Yemen, Brazil, Colombia, Equador, Guatemala, Southern Mexico and Venezuela.
Transmission:
Transmitted by a certain species of female black flies which bite by day and are most frequently found near rapidly flowing rivers and streams.
Symptoms:
Can cause blindness and severe low vision, and well as severe itching.
Vaccine:
No vaccine is currently available and the best cause of prevention is to avoid areas where black flies may be rife as well as taking steps to prevent insect bites as much as possible (i.e. where full length light clothing and use a good insect repellant).
Quick Quote!
Dr Travel Tips
- When camping, reduce the chance of insect bites by wearing light coloured clothing and avoiding perfumes.
- This is on 'oldy but a goody': always pack a spare pair of clothes in you hand luggage just in ‘case’ the airline loses your other baggage.
- Before you travel you should call your bank and let them know where you are travelling and the dates of your trip to avoid bank card issues.
- Some tips seem obvious but return the best value, this is one. Always retain a cheery disposition wherever you are travelling, you will receive far greater service – a smile is multilingual.
- To save space in your luggage and reduce the weight should you be charged extra, take samples of toiletries rather than packing your large ‘home size’ containers.


