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Signs in older lambs, kids, calves and adults vary from acute to subclinical (20-70% mortality), Signs can include fever (lasts 24-96hrs), weakness, bloody diarrhoea, abdominal pain, photosensitivity, anorexia, excessive salivation and decreased milk production. Signs in adult cattle are most often subclinical with less than 10% mortality.<ref name="oie" /> <ref name="fao"/> <ref name="vaccine"/>

Signs in older lambs, kids, calves and adults vary from acute to subclinical (20-70% mortality), Signs can include fever (lasts 24-96hrs), weakness, bloody diarrhoea, abdominal pain, photosensitivity, anorexia, excessive salivation and decreased milk production. Signs in adult cattle are most often subclinical with less than 10% mortality.<ref name="oie" /> <ref name="fao"/> <ref name="vaccine"/>

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Camels display signs similar to those seem with Pasteurellosis infection, though infection can also be subclinical or asymptomatic. Abortions can also occur. During the 2010 outbreak in Mauritania 2 forms of disease were observed in camels; a hyperacute form causing sudden death in <24hrs and an acute form causing fever, ataxia, respiratory signs, icterus, oedema, foot lesions and neurological signs. If haemorrhagic signs were observed death occurred in a few days.<ref> ''Ahmed B. Ould El Mamy, Mohamed Ould Baba, Yahya Barry, Katia Isselmou, Mamadou L. Dia,

Camels display signs similar to those seen with Pasteurellosis infection, though infection can also be subclinical or asymptomatic. Abortions can also occur. During the 2010 outbreak in Mauritania 2 forms of disease were observed in camels; a hyperacute form causing sudden death in <24hrs and an acute form causing fever, ataxia, respiratory signs, [[icterus]], oedema, foot lesions and neurological signs. If haemorrhagic signs were observed death occurred in a few days.<ref> ''Ahmed B. Ould El Mamy, Mohamed Ould Baba, Yahya Barry, Katia Isselmou, Mamadou L. Dia,

Ba Hampate, Mamadou Y. Diallo, Mohamed Ould Brahim El Kory, Mariam Diop, Modou Moustapha Lo, Yaya Thiongane, Mohammed Bengoumi, Lilian Puech, Ludovic Plee, Filip Claes,Stephane de La Rocque, and Baba Doumbia,'' (2011) Unexpected Rift Valley Fever Outbreak, Northen Mauritania, Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 17, No. 10, October 2011 </ref>

Ba Hampate, Mamadou Y. Diallo, Mohamed Ould Brahim El Kory, Mariam Diop, Modou Moustapha Lo, Yaya Thiongane, Mohammed Bengoumi, Lilian Puech, Ludovic Plee, Filip Claes,Stephane de La Rocque, and Baba Doumbia,'' (2011) Unexpected Rift Valley Fever Outbreak, Northen Mauritania, Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 17, No. 10, October 2011 </ref>

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Differential diagnosis should include: bluetongue, Wesselbron disease, Enterotoxaemia of sheep, Ephemeral fever, Brucellosis, Vibrosis, Trichomonosis, Nairobi sheep disease, Heartwater, Ovine enzootic abortion, plant toxicity, bacterial septicaemias, Rinderpest, Anthrax.<ref name="oie" />

Differential diagnosis should include: [[Bluetongue Virus|bluetongue]], Wesselbron disease, Enterotoxaemia of sheep, [[Ephemeral Fever|Ephemeral fever]], [[Bovine Brucellosis|Brucellosis]], Vibrosis, [[Trichomonosis - Cattle|Trichomonosis]], Nairobi sheep disease, [[Heartwater]], [[Enzootic Abortion of Ewes|Ovine enzootic abortion]], plant toxicity, bacterial septicaemias, [[Rinderpest]], [[Anthrax]].<ref name="oie" />

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Humans develop '''malarial-like''' disease. High risk individuals include farmers, veterinarians and abattoir staff. Mild disease is most common but severe hepatitis, encephalitis and ocular damage can develop. The usual presentation is of sudden onset fever, myalgia, biphasic behaviour and gastrointestinal disease.<ref name="who"/>

Humans develop '''malarial-like''' disease. High risk individuals include farmers, veterinarians and abattoir staff. Mild disease is most common but severe hepatitis, encephalitis and ocular damage can develop. The usual presentation is of sudden onset fever, myalgia, biphasic behaviour and gastrointestinal disease.<ref name="who"/>