Schistosome egg. Coloured scanning electron micro- graph (SEM) of an egg of the parasitic fluke Schi- stosoma mansoni,cause of the disease bilharzia (schistosomiasis). The eggs are produced by female flukes living in veins in the intestines and bladder of humans. They are passed in urine and faeces,entering rivers and lakes in sewage. The larvae which hatch infect water snails,leaving these hosts as free-swimming cercariae. These can penetrate the skin of anyone in the water,beginning a new cycle of human infection. Bilharzia is endemic in tropical countries,and can cause kidney and liver damage. It is treatable with drugs. Magnification: x250 at 6x7cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NIBSC |
Bildgröße: | 2640 px × 2100 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |