Effect of Rift Valley fever virus on pregnant and non-pregnant local Barki ewes after artificial infection.
Studies were conducted into effects of Rift Valley fever virus on oestrous and vaginal cytology in non-pregnant ewes. 6 pregnant and 8 non-pregnant local Barki ewes were subcutaneously inoculated with different doses of virus isolated from Sharkia Province. Observed were irregularities in the oestrous cycle (20-28 days inoculation) and anoestrum. The anoestrum smears included large non-cornified epithelial cells with large well stains centrally located nuclei together with a large number of bacteria. Abortion and retention of placenta occurred in pregnant ewes with prolonged puerperal heat up to 70 days. Inoculation of virus was followed by thermal response. Re-isolation of virus in BHK cells was possible from aborted foetuses and placenta.
Wasel
M
M
Abassia Serum and Vaccine Research Institute, Cairo, Egypt.
Atia
M M
MM
Mohsen
A
A
el-Sayed
M
M
Zaki
K
K
D000034:Abortion, Veterinary; D000818:Animals; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000503:physiopathology / Q000662:veterinary*; D012295:Rift Valley Fever / Q000503:physiopathology*; D012756:Sheep; D012757:Sheep Diseases / Q000503:physiopathology*