Incidence of bluetongue virus precipitating antibodies in sera of some domestic animals in the Sudan

Eisa, M.; Karrar, A. E.; Elrahim, A. H. Abd

doi:10.1017/s0022172400026395

Cited by 25 publications

(21 citation statements)

References 4 publications

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“…BTV antibodies were prevalent both at herd and individual animal level and were detected in all farms tested in Gazira and Khartoum States. However, prevalence rates in the present study were generally higher than those observed in previous studies [15, 19, 20]. This discrepancy may partly be ascribed to the apparent greater sensitivity of the cELISA used in the present study compared to that of the AGID technique used in earlier studies.…”

Section: Discussioncontrasting

confidence: 95%

Seroprevalence of Bluetongue Virus in Dairy Herds with Reproductive Problems in Sudan

Elhassan

Fadol

Hussein

2014

ISRN Veterinary Science

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The objectives of this cross-sectional study were to determine the seroprevalence of blue tongue virus (BTV) and assess potential risk factors associated with BTV infection in dairy cattle with reproductive problems in Sudan. Serum samples were collected from a total of 784 animals from 37 herds and tested for antibodies against BTV using cELISA. A total of 663 out of 784 (84.57%) sera tested proved positive for BTV antibodies in all farms tested in Khartoum and Gazira States. The prevalence of antibodies was high in both areas being 94.32% in Gazira State and 76.62% in Khartoum State. BTV antibodies prevalence were significantly higher (P < 0.000) in older animals than in younger ones. These rates were also significantly higher in the rainy season (P < 0.000) and in Gazira State compared to Khartoum State. Sex also showed significant (P < 0.000) differences in the seroprevalence, whereby females (74.7%) had higher level than males (9.8%). However, no significant (P > 0.09) variations for BTV seroprevalence were observed between breeds. The BTV antibodies prevalence in infertility cases (86.6%) was not significantly different from that found in abortion (74.3%) or neonatal death (66.7%) cases. The high seroprevalence of BTV recorded herein calls for control strategy to be implemented.

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Section: Discussioncontrasting

confidence: 95%

Seroprevalence of Bluetongue Virus in Dairy Herds with Reproductive Problems in Sudan

Elhassan

Fadol

Hussein

2014

ISRN Veterinary Science

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“…A modification of the technique described by Ouchterlony (1949) was adopted, essentially as outlined earlier (Eisa, Karrar & Abdel Rahim, 1979), except that the diffusion medium consisted of 1 % purified agar (Difco, Detroit, Michigan, U.S.A.) in buffered saline (pH 7 2). To check on lines of identity for interpretation, positive and negative control preparations were included in each series of tests.…”

Section: The Agar-gel Precipitation (Agp) Testmentioning

confidence: 99%

Preliminary survey of domestic animals of the Sudan for precipitating antibodies to Rift Valley fever virus

Eisa¹

1984

J. Hyg.

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SUMMARYIn a preliminary seroepidemiological survey a total of 780 serum samples derived from various domestic animals of the Sudan were examined for Rift Valley fever (RVF) virus precipitating antibodies. The incidence was approximately 34-3 % in sheep, 33-2 % in cattle, 22 % in goats, 7 9 % in camels and 4 % in donkeys. The findings indicated that RVF is mainly prevalent in the rich savanna areas of the south as well as the irrigated areas close to the Nile in the north.Circumstantial evidence suggests that the detected antibodies were induced by a long-standing cryptically cycling infection and that resurgence of extensive epizootics is unlikely although limited outbreaks may occur. It is concluded that RVF virus circulates across the country in a south-north range along the Nile Valley with little or no extension to the drier lands to the east and west, and that ruminants are the primary species involved in virus maintenance. These species evidently serve as main amplifiers of infection during epizootics, but whether or not they also serve as sole virus reservoirs in inter-epizootic periods has yet to be determined.

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“…Bluetongue virus (BTV) is widespread in the Sudan (Eisa, Karrar & Abu Elrahim, 1979;Eisa et al 1980; W. P. Taylor (personal communication) but so far there have been no isolates of this or any other virus from Culicoides midges in that country (Boorman & Mellor, 1982). Previous work has shown that C. kingi (schultzei gp) and C. imicola are the only Culicoides species collected around cattle and sheep pens in the Khartoum area in sufficient numbers to be efficient vectors of BTV.…”

Section: Introductionmentioning

confidence: 99%

Isolation of bluetongue and related viruses from Culicoides spp. in the Sudan

Mellor

Osborne

Jennings

1984

J. Hyg.

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SummaryInfection of domestic ruminants with bluetongue virus (BTV) is widespread in the Sudan but there are no records of vector species of Culicoides in that country. Therefore, light-trap collections of Culicoides for virus isolation procedures were made in the Khartoum and Um Benein areas of the Sudan during September–October 1982.Two virus isolates were made from pools of unengorged, female Culicoides. An isolate from a pool of C. kingi (schultzei gp) is a member of the Epizootic Haemorrhagic Disease (EHD) serogroup. The other isolate from a pool of C. imicola, a known BTV vector in other parts of Africa, is type-5 BTV.In laboratory experiments, the North American vector of BTV, C. variipennis, supported replication of both Sudanese isolates to a high titre and transmission occurred after 10 days' incubation.This paper records the first isolation in the Sudan of arboviruses from Culicoides, with the identification of a BTV serotype and the presence of a member of the EHD (genus orbivirus, family Reoviridae) serogroup.

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Incidence of bluetongue virus precipitating antibodies in sera of some domestic animals in the Sudan

Cited by 25 publications

References 4 publications

Seroprevalence of Bluetongue Virus in Dairy Herds with Reproductive Problems in Sudan

Seroprevalence of Bluetongue Virus in Dairy Herds with Reproductive Problems in Sudan

Preliminary survey of domestic animals of the Sudan for precipitating antibodies to Rift Valley fever virus

Isolation of bluetongue and related viruses from Culicoides spp. in the Sudan

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