Rift Valley fever in Egypt 1986. Surveillance of sheep flocks grazing in the northeast Nile Delta

B. A M Botros, Thomas Ksiazek, J. C. Morrill, A. W. Salib, A. K. Soliman, R. M. Scott, A. Barakat

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

From October 1985 through November 1986, 1714 presumably unvaccinated sheep in 13 nomadic flocks located in four provinces in Dakahliya Governorate, in the northeast Nile Delta, were ear tagged and monitored for acquisition of Rift Valley fever virus (RVFV) antibodies. Sheep were bled at approximately 3 month intervals and sera were tested for haemagglutination inhibition (HI) antibodies to RVFV. HI reactors were tested for RVFV specific IgM antibody by enzyme-linked immunosorbent assay (ELISA) and neutralizing antibody to RVFV by plaque reduction neutralization (PRN) tests. Base line results showed 1.2% prevalence of HI antibody to RVFV with titres from 1:20 to 1:320. All HI positive sera were PRN positive though PRN titres were generally higher than HI titres. No RVFV specific IgM antibody was detected in the HI and PRN positive sera. Throughout the study, no initially seronegative sheep became positive and no HI positive sheep showed an appreciable increase above initial antibody titre. These data indicate absence of RVFV transmission to sheep in Dakahliya Governorate during the period of the study.

Original languageEnglish (US)
Pages (from-to)183-188
Number of pages6
JournalJournal of Tropical Medicine and Hygiene
Volume91
Issue number4
StatePublished - 1988
Externally publishedYes

Fingerprint

Rift Valley Fever
Rift Valley fever virus
Egypt
Hemagglutination
rift zone
Viruses
Antibodies
sheep
antibody
Sheep
virus
grazing
neutralization
serum
Immunoglobulin M
Serum
Neutralization Tests
surveillance
Neutralizing Antibodies
Viral Load

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

Cite this

Botros, B. A. M., Ksiazek, T., Morrill, J. C., Salib, A. W., Soliman, A. K., Scott, R. M., & Barakat, A. (1988). Rift Valley fever in Egypt 1986. Surveillance of sheep flocks grazing in the northeast Nile Delta. Journal of Tropical Medicine and Hygiene, 91(4), 183-188.

Rift Valley fever in Egypt 1986. Surveillance of sheep flocks grazing in the northeast Nile Delta. / Botros, B. A M; Ksiazek, Thomas; Morrill, J. C.; Salib, A. W.; Soliman, A. K.; Scott, R. M.; Barakat, A.

In: Journal of Tropical Medicine and Hygiene, Vol. 91, No. 4, 1988, p. 183-188.

Research output: Contribution to journalArticle

Botros, BAM, Ksiazek, T, Morrill, JC, Salib, AW, Soliman, AK, Scott, RM & Barakat, A 1988, 'Rift Valley fever in Egypt 1986. Surveillance of sheep flocks grazing in the northeast Nile Delta', Journal of Tropical Medicine and Hygiene, vol. 91, no. 4, pp. 183-188.
Botros, B. A M ; Ksiazek, Thomas ; Morrill, J. C. ; Salib, A. W. ; Soliman, A. K. ; Scott, R. M. ; Barakat, A. / Rift Valley fever in Egypt 1986. Surveillance of sheep flocks grazing in the northeast Nile Delta. In: Journal of Tropical Medicine and Hygiene. 1988 ; Vol. 91, No. 4. pp. 183-188.
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