Leishmaniasis vaccination. Young girl receiving a leishmaniasis vaccine. This tropical disease is caused by Leishmania sp.,a parasitic protozoan,which is transmitted by bites from infected sand- flies. Vaccines contain dead or weakened disease- causing organisms. Following vaccination,the immune system becomes sensitized,preparing the body for the disease if infection does occur. In the more serious form,visceral leishmaniasis (kala-azar),there is fever,spleen enlargement,liver damage,and,without treatment,sometimes even death. The other form,cutaneous leishmaniasis,results in the development of an ulcer around the bite. Photographed in Iran | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Crump, A. / WHO / TDR |
Taille de l’image : | 5133 px × 3419 px |
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