vc1d vc wash cluster – emergency training 1 vector control module 1d schistosomiasis
TRANSCRIPT
1VC1D
VCWASH Cluster – Emergency Training
Vector ControlModule 1D
Schistosomiasis
2VC1D
VCWASH Cluster – Emergency Training
Schistosomiasis distributionWorldwide: 200 million people infected
3VC1D
VCWASH Cluster – Emergency Training
Snails
Miracidia
Cercariae
Life cycle Schistosome eggs
VC1D
VCWASH Cluster – Emergency Training
Worms swim to peoples feet and burrow in!
Intermediate host snails: A Bulinus transmits Schistosoma haematobium
VC1D
VCWASH Cluster – Emergency Training
Schisto exposure
Washing clothes in a pond containing intermediate host snails, a source of schisto infection.
VC1D
VCWASH Cluster – Emergency Training
Water project dangers
After the Navrongo irrigation dam (Ghana) was built, the incidence of schistosomiasis increased dramatically up to 87% prevalence.
7VC1D
VCWASH Cluster – Emergency Training
Symptoms of Schistosomiasis• abdominal pain• diarrhoea• blood in the stool or urine• liver enlargement is common in advanced cases
• In women, urogenital schistosomiasis may present with genital lesions, vaginal bleeding, pain during sexual intercourse and nodules in the vulva. In men, urogenital schistosomiasis can induce pathology of the seminal vesicles, prostate and other organs.
• In sub-Saharan Africa, more than 200 000 deaths per year are due to schistosomiasis.
8VC1D
VCWASH Cluster – Emergency Training
Control measures (1)• Drugs to reduce number of eggs in
infected person
• Reduce snail population
• Reduce release of eggs from snails
• Engineer ways to reduce the need for contact with water
9VC1D
VCWASH Cluster – Emergency Training
Control measures (2)• Hygienic disposal of faeces
• Molluscocides can be used to control schito
• Grass cutting on river edges can be effective for controlling schistosomiasis snails
10VC1D
VCWASH Cluster – Emergency Training
Control
• Environmental control
• Mollusciciding