Читать книгу Farm Animal Medicine and Surgery - Graham R Duncanson - Страница 179

This is caused by a rickettsia, Ehrlichia ruminantium, which is spread by Amblyomma spp. ticks. It occurs in tropical Africa, the Caribbean, South and Central America and tropical parts of the USA. The disease is normally acute with a high fever and an increased vascular permeability, which causes hydropericardium and hydrothorax. These signs lead on to fatal neurological signs. Diagnosis is confirmed by the presence of the organism in Diff-Quik stained brain smears. Treatment is with high doses of oxytetracycline. Control is through effective tick control and vaccination.