Changes

Considering all cases, including those which are subclinical, mortality due to bluetongue in sheep ranges between 2% and 30%¹⁴. Death can occur up to a month after the onset of clinical signs,acutely affected sheep may be protracted. However, mild cases often recover quickly and completely. Some cases of ovine bluetongue follow a more chronic course with death occuring after a month post-infection due to exhaustion and bacterial complications.

Considering all cases, including those which are subclinical, mortality due to bluetongue in sheep ranges between 2% and 30%¹⁴. Death can occur up to a month after the onset of clinical signs,acutely affected sheep may be protracted. However, mild cases often recover quickly and completely. Some cases of ovine bluetongue follow a more chronic course with death occuring after a month post-infection due to exhaustion and bacterial complications.

 

Disease is most often sub-clinical in cattle despite its epidemiological significance in this species: it has been reported that only 0.01% of infected cattle show signs of bluetongue¹. Clinical signs, when seen, can include inflammation or erosions of the oral and nasal mucosae and a stiff gait. Similar signs to sheep may also occur: pyrexia, tachypnoea, lacrimation, salivation and a vesicular, ulcerative dermatitis are all possibilities. In cattle in early gestation, embryonic death and resorption can result from BTV infection.

Disease is most often sub-clinical in cattle despite its epidemiological significance in this species: it has been reported that only 0.01% of infected cattle show signs of bluetongue<sip>1</sup>. Clinical signs, when seen, can include inflammation or erosions of the oral and nasal mucosae and a stiff gait. Similar signs to sheep may also occur: pyrexia, tachypnoea, lacrimation, salivation and a vesicular, ulcerative dermatitis are all possibilities. In cattle in early gestation, embryonic death and resorption can result from BTV infection.

===Laboratory Tests===

===Laboratory Tests===