heartwater造句

• Animals often acquire the disease when moved on to heartwater infected grazing.
• Some species, notably the heartwater which can be particularly devastating in cattle.
• Diseases that effect the sheep and goats include foot rot, internal parasites and heartwater.
• Heartwater, caused by " Ehrlichia " ruminantium, is a prevalent tick borne disease of livestock in Africa and the Caribbean but also threatens the American mainland.
• The cattle egret can be a safety hazard to aircraft due to its habit of feeding in large groups in the grassy verges of airports, and it has been implicated in the spread of animal infections such as heartwater, infectious bursal disease and possibly Newcastle disease.
• In areas endemic for heartwater there is likely to be use of dips against other ticks of domestic animals, such as " Rhipicephalus ( Boophilus ) " and " Hyalomma " species and this will usually contribute to control of vectors of " Ehrlichia ruminantium ".
• In March 2000, the U . S . Department of Agriculture did ban imports of three African tortoise species _ the leopard, Bell's hingeback and African spur _ after a tick species for which they served as host was found to carry heartwater disease, a bacterial ailment unknown in America but dangerous to livestock.