Veterinary Public Health & Preventive Medicine

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Author: search.filters.author.Oluwayelu, D.O.Subject: search.filters.subject.African swine fever

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    Analysis and evaluation of mortality losses of the 2001 African swine fever outbreak, Ibadan, Nigeria
    (2007-08) Babalobi, O. O; Olugasa, B. O.; Oluwayelu, D.O.; Ijagbone, I. F.; Ayoade, G. O.; Agbede, S. A.
    The mortality losses of pigs of various age groups affected by the 2001 African swine fever outbreak in Ibadan Nigeria were analyzed and evaluated. Thirty one thousand nine hundred and sixteen (31,916) pigs on three hundred and six (306) farms reported by the Pig Farmers Association of Nigeria and the State Ministry of Agriculture and Natural Resources were involved. Gross mortality was ninety one percent (91%), while age group mortality ranged from 75.9% (growers), 83.1% (weaners), 91.2% (finishers) and 99.8% (piglets); to 100.0% in gilts, sow and boars. Losses were estimated to worth nine hundred and forty one thousand, four hundred and ninety one dollars, sixty seven cents (US $941,491.67). Highest financial loss was from sows (29.5% of total loss), followed by gilts (16.6%), finishers (15.2%), weaners (10.7%), boars (10.6%), growers (10.6%) and piglets (8.2%). Average mortality loss per farm of $3076.77 was of great financial and socioeconomic consequences for a developing country like Nigeria with a low Gross Domestic Product figures. In conclusion, the need to immediately revisit and take recommended actions on the 1998 Report of the FAO Consultancy Mission to Nigeria on Control and Eradication of an Outbreak of African swine fever in Western Nigeria is stressed
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    Confirmatory diagnosis of African swine fever in southern Nigeria by immunoblotting assay
    (2005) Olugasa, B. O.; Oluwayelu, D.O.; Adewale, G.A.; Adewale, G.A.; Ayoade, G.O.; Ijagbone, I.F.; Babalobi, O.O.; Agbede, S.A.
    When a swine epizootic occurred in groups of pigs in south western Nigeria in 2001, a need for detailed investigation and confirmatory diagnosis arose at the University of Ibadan. A class of epizootiology students at the university was involved in the investigation. Comprehensive information about the nature and causation of the disease was provided. Four diagnostic techniques were used for confirmatory diagnosis, including Indirect Enzyme Linked Immunosorbent Assay (I-ELISA), immunoblotting, polymerase chain reaction (PCR), and virus isolation. Only immunoblotting assay was used at the University of Ibadan, while samples were sent to the National Veterinary Research Institute (NVRI) in Vom, Nigeria for I-ELISA and to two reference laboratories for African swine fever in South Africa and Madrid, Spain for PCR and virus isolation respectively. The results obtained from these laboratories using the other three diagnostic techniques were compared with that of the immunoblotting assay. Immunoblotting assay confirmed all samples that tested positive on PCR and virus isolation. It was also relatively easier to use, highly sensitive and specific for confirmatory diagnosis. It was however costlier in application for large sample size testing compared to I-ELISA.