FACULTY OF VETERINARY MEDICINE

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Subject: search.filters.subject.Seroprevalence

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    Serological evidence of African swine fever virus infection in commercial pig herds in Southwest Nigeria
    (2007-07) Olugasa, B. O.
    Sera from pigs were assayed for African swine fever virus (ASFV) antibodies to determine the presence and prevalence of ASFV infection in 28 pig herds in southwest Nigeria during 2006 - 2007. A total of 374 pigs were screened in Lagos, Ogun, Ondo, Osun and Oyo States using the Enzyme Linked Immunosorbent Assay method. Out of the 28 farms, 2 were negative (7.1%) for ASFV antibodies. Thirteen out of 15 small herds (86.7%) and 13 out of 13 (100%) medium and large farms were positive for ASFV antibodies. Seroprevalence ranged from 50% (Ondo), 52.5% (Oyo), 59.8% (Lagos), and 60.7% (Ogun) to 70% (Osun). Seroprevalence was higher within the older stocks - finishers, gilts, sows and boars (77.3%- 96.8%) than in the younger stocks - piglets, weaners, and growers (13.8%-39.7%). In essence, almost all breeder stocks became infected. The overall prevalence rate of 65.2% (244/374) and average prevalence rate of 56.8% per farm were indicative of widespread ASFV infection in pig population in southwest Nigeria. This study shows the persistence of ASFV since its re-introduction into southwest Nigeria in 1997. This highlights the need for improved hygiene and biosecurity measures on pig farms. In conclusion, the need for renewed collaboration between livestock and veterinary extension services providers to implement strategies for ASFV control in southwest Nigeria is stressed.
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    Diagnosing trichinellosis in pigs slaughtered at a major abattoir in Lagos State Nigeria
    (2014) Uwalaka, E. C.; Adediran, O. A.
    Trichinellosis, an infection caused by the Trichinella spp has been known to occur worldwide affecting almost all species of animals including man. It is an emerging or re- emerging disease in developed and developing countries. This survey was conducted to investigate the prevalence of trichinellosis in domestic pigs slaughtered in Lagos, Nigeria. Nine hundred pig sera were collected at slaughter in an abattoir in Lagos state. The sera samples were stored frozen at the parasitology research laboratory of the department of Veterinary Microbiology and Parasitology, University of Ibadan till used. Post mortem examination was also carried out for 350 carcasses of the 900 from which blood samples were collected using standard procedures. 53 out of the 900 samples collected were seropositive for Trichinella E/S antigen using ELISA kit. No Trichinella cysts were found at postmortem examination. One of the sample positive at serology was negative at postmortem. A total sero- prevalence of 5.89% was obtained, 5.83 % (adults) and 7.65% of growers were positive. There was no serological evidence of trichinellosis in samples (44) collected from weaners. The male pigs had a higher prevalence (6.14%) than the females (5.45%). However, the differences between the ages and the sexes were not statistically significant (P≤ 0.05).This study has been able to provide serological evidence of the presence of trichinellosis in this state and thus the need to carry out proper postmortem examination after slaughter. Also, the absence of cyst at postmortem and the presence of antibodies at serology show that postmortem examination is not enough to screen for Trichinella in slaughtered food animals hence the need for the establishment of diagnostic laboratories at abattoirs in the country
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    Seroprevalence of trichinellosis in pigs slaughtered in Bodija abbattoir Oyo State Nigeria
    (World Journal of Life Science and Medical Research, 2012-12) Adediran, O.; Uwalaka, E. C.
    This survey was carried out to determine the prevalence of trichinellosis in Bodija municipal abattoir of Oyo state, Nigeria. Sera samples were collected from pigs slaughtered on the slabs from July to November, 2010 and taken to the laboratory in the department of Veterinary Microbiology and Parasitology, University of Ibadan for analysis. The samples were processed for Trichinella antibodies by ELISA using excretory-secretory (E/S) antigen.246 samples were collected and a prevalence of 15.04% was recorded. Adult pigs had a higher prevalence (35.55%) than the young (8.40, 14.29) and prevalence in male pigs was slightly higher (19.80%) than the females (11.72%) though this prevalence is not statistically significant