Egg drop syndrome 76 in Nigeria: serological evidence in commercial farms

Nawathe, D. R.; Abegunde, Ayokunle T.

doi:10.1136/vr.107.20.466

Cited by 13 publications

(4 citation statements)

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“…Vertical transmission is common in EDS' 76 virus infection but congenitally infected birds may not become serologically positive until 25-28 weeks of age VanEcz (1982). Because it has been observed that congenital infection remains dormant until sexual maturity or in response to stress of production Nawathe and Abegunde (1980). Contrary to this the present observation of HI antibody in broiler birds provides evidence for horizontal spread of the virus.…”

Section: Aiv-(h9)contrasting

confidence: 92%

Epidemiological Highlights on Some Viruses Associated With Increased Mortality in Chickens Bred in Sharkia Governorate.

H.A.A.

O.A.

2015

Assiut Veterinary Medical Journal

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In the present study 1317 serum samples obtained from 6 broiler flocks, 2 broiler breeders and 28 commercial layer flocks were examined for HI antibodies of {NDV, IBV 4/91,, AIV (H5N1, H5N2, H5N3, H9, H7) and Adenov (EDS 76 )}. Studying the vaccination protocols in flocks under investigation and their seroconversion had led us to speculate and conclude viral affections in the different localities of Sharkia governorate. Speculating viral affections was a very hard task because the Egyptian market is jammed with a great variety of protective vaccines this was conflicting during result interpretation. Positive immune titers for AIV-H7 in sharkia governorate was detected at June /2014 in (El-salhia, 10 th of Ramadan, El-ibrahemia and Abo-hammed) in commercial layer flocks only. The seropositive samples that exceeded the cutoff values were 63 out of 1317 (4.8%). AIV-H9 high seropositive immune titers was constantly found in examined samples although their protective vaccines were neglected. AIV-H 5 N 3 seropositive results was recorded in a totally non vaccinated flocks against H 5 which reflect virus circulation in the poultry premises. Seropositive titer for IBV-D 274 and EDS 76 was recorded in a totally non vaccinated flocks against such antigens., which refer to their role in the total simultaneous incidence of disease and consequent mortality. From another point of view it should be noted that. Vaccinating chicken flocks following a ready made manuscript of the producing companies without prior evaluation of the maternally derived antibodies (MDA) or evaluating the immune titers before taking the decision of vaccination or even considering the disease situation in the area is possible cause for vaccine failure. Sentinel birds inclusion in poultry patches should be taken seriously to give a mirror for the circulating viral agents in the poultry premises. It worth to mention that a parallel bacteriological work was running during investigation of the causes of increased mortality or dropped egg production. This work revealed the isolation of a resistant bacteria of the (Kebseilla spp).

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Section: Aiv-(h9)contrasting

confidence: 92%

Epidemiological Highlights on Some Viruses Associated With Increased Mortality in Chickens Bred in Sharkia Governorate.

H.A.A.

O.A.

2015

Assiut Veterinary Medical Journal

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“…This is probably because the affected birds are apparently healthy (Ezema et al, 2008). In addition, there are sparse studies reporting serological evidence of EDS'76 in backyard poultry in Nigeria with the majority of such reports carried out in commercial chicken flocks (Nawathe et al, 1980;Elayo et al, 2010;Igbokwe et al, 2020). Hence, this study aimed to investigate the presence of this virus in backyard poultry flocks in Southwestern Nigeria.…”

Section: Discussionmentioning

confidence: 97%

Serological evidence of egg drop syndrome 1976 in backyard poultry flocks in Southwestern Nigeria

Adebiyi

Fagbohun²

2022

Rev. Elev. Med. Vet. Pays Trop.

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In Nigeria, egg drop syndrome 1976 (EDS’76), unlike other poultry diseases, has been given little attention as a cause of economic losses due to decreased egg production, particularly in backyard poultry flocks. This study aimed to investigate the presence of EDS’76 virus in backyard poultry flocks in Oyo and Osun states, Southwestern Nigeria. Blood samples were collected in 24 farms from 218 apparently healthy, unvaccinated birds which comprised 30 Japanese quails, 75 turkeys, 30 ducks, 57 indigenous chickens and 26 guinea fowls. Indirect ELISA was used to detect anti-EDS’76 virus antibodies in sera from the birds, and poultry owners were interviewed on their purposes with regard to bird raising. Overall, 139 (63.8%) sera were positive for EDS’76 with 26.7% (8/30), 90.7% (68/75), 33.3% (10/30), 89.5% (51/57) and 7.7% (2/26) from Japanese quails, turkeys, ducks, indigenous chickens and guinea fowls, respectively. Some of the farmers practiced placing eggs from guinea fowls under brooding indigenous hens for natural incubation, or sold eggs from turkeys and ducks to commercial hatcheries. Our findings suggest that these bird species serve as reservoirs of EDS’76 virus with the probable involvement of backyard poultry in its transmission, particularly to commercial poultry and other birds in Southwestern Nigeria. Thus, backyard poultry should be included in anti-EDS’76 vaccination schedules in the country.

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“…The infection is characterized by sudden drop in Egg production, failure of hens to achieve peak production and by laying of malformed eggs such as thin shelled, soft shelled and shell less eggs by apparently healthy flock (McFerran et al 1978). Nawathe and Abegunde (1980) have reported high incidence of antibodies to Egg drop syndrome −76 virus among commercial layers in Northern Part of Nigeria. Duroajaiye et al (1991) reported the infection in poultry in Western states of Nigeria.…”

Section: Introductionmentioning

confidence: 98%

Seroprevalence of egg drop syndrome - 76 virus as cause of poor egg productivity of poultry in Nsukka, South East Nigeria

Ezeibe

Okoroafor

Eze

et al. 2007

Trop Anim Health Prod

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To determine if egg drop syndrome 76 virus infection is among the causes of lowered egg productivity in commercial poultry farms in South Eastern Part of Nigeria and to know the prevalence of the infection, ten farms with history of lowered egg production in Nsukka local government area of Enugu State were randomly selected. Sera from ten hens in each of the selected farms were assayed for antibodies against EDS 76 virus by the haemagglutination-inhibition (HI) test. The mean HI titre of the ten hens in each of the farms was recorded as EDS - 76 antibody titre for the farm. Nine out of the 10 farms tested were positive for EDS - 76 antibodies with HI titres ranging between 16 and 256. Out of 10 flocks with production of 65% and above 9 were EDS-76 HI negative.

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Egg drop syndrome 76 in Nigeria: serological evidence in commercial farms

Cited by 13 publications

References 0 publications

Epidemiological Highlights on Some Viruses Associated With Increased Mortality in Chickens Bred in Sharkia Governorate.

Epidemiological Highlights on Some Viruses Associated With Increased Mortality in Chickens Bred in Sharkia Governorate.

Serological evidence of egg drop syndrome 1976 in backyard poultry flocks in Southwestern Nigeria

Seroprevalence of egg drop syndrome - 76 virus as cause of poor egg productivity of poultry in Nsukka, South East Nigeria

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