Light micrograph of blood infected with the parasitic protozoan,Trypanosoma rhodesiense,one of the agents of African sleeping sickness. The trypanosomes appear here as elongated,ribbon-like objects,stained purple; numerous red blood cells appear grey. T. rhodesiense is transmitted by bites from the tsetse fly Glossina morsitans: the other species causing sleeping sickness,T. gambiense,is transmitted by G. palpalis. After completion of their insect life-cycle stages,trypanosomes appear & multiply in the bloodstream. The characteristic lethargy caused by meningo- encephalitis appears after about a month. Magnification: X 250 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Durham, John |
Taille de l’image : | 5001 px × 3297 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |