Leishmanin skin test. Young girl undergoing a leishmanin skin test to see if she is eligible for the leishmaniasis vaccine. The test is carried out by injecting leishmanin under the skin. A reaction indicates the presence of the disease,so vaccination is needed. Leishmaniasis is a tropical disease which comes in two forms: visceral (kala- azar) and cutaneous,both caused by Leishmania sp.,a parasitic protozoan. The diseases are transmitted by bites from infected sand-flies. Vaccines contain dead or weakened disease-causing organisms. Following vaccination,the immune system becomes sensitized,helping the body to fight the disease. Photographed in Iran | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Crump, A. / WHO / TDR |
Taille de l’image : | 3516 px × 5147 px |
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