Veterinary Public Health & Preventive Medicine
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Item Geographical Information System (GIS) Mapping of Spatio-Temporal pollution status of Rivers in Ibadan, Nigeria(Asian Network for Soioniifio Information, 2008) Adeyemo, O. K.; Babalobi, O. O.More accurate spatio-temporal predictions of urban environment arc needed as a basis for assessing exposures as a part of environmental studies and to inform urban protection policy and management. In this study, an information system was developed to manage die physico-chemical pollution information of Ibadan river system. Oyo Slate, Southwest Nigeria. The study took into account die seasonal influences of point and non-point discharges on die levels of physico-chemical parameters. The overall sensitivity of the watershed to physicochemical environmental pollution revealed dial during dry season, of the 22 (100%) sample points, only 3(13.6%) were unpolluted, 6 (27.3%) were slightly polluted, 10 (45.4%) were moderately polluted. 2 (91%) were seriously polluted and 1 (4.5%) was exceptionally polluted During rainy season, 3 (13.6%) were unpolluted. 7 (31.8%) were slightly polluted, 9 (40.9%) were moderately polluted, 2 (9.1%) were seriously polluted and 1 (4.5%) was exceptionally polluted There is a considerable environmental risk associated with the present level of pollution of the Ibadan river water body on fish health and biodiversity This research provides a basis for aquatic management and assist in policy making at national and international levels Appropriate strategies for the control of point and non-point pollution sources, amendments and enforcement of legislation should be developed.Item Isolation of influenza A viruses from pigs in Ibadan,Nigeria(2009) Adeola, O. A.; Adeniji, J. A.; Olugasa, B. O.The authors investigated influenza virus types in pigs in Ibadan, a city in Oyo State, southwestern Nigeria. From April to June 2008, nasal swabs were collected from pigs at three locations in Ibadan. Influenza A viruses (four A [H1N1], two A [H3N2] and one A [H1N1]‐ A [H3N2] double reactant) were isolated from 7 of the 50 apparently healthy Landrace pigs tested. This study is the first documented isolation of swine influenza viruses in Nigeria and it reveals that different strains of influenza viruses co‐circulate in pigs in Ibadan. These pigs serve as reservoirs of different subtypes of influenza viruses and potential ‘mixing vessels’ in which genetic reassortment and the generation of future human pandemic strains could occur. These findings support the need for adequate and periodic surveillance among swine populations and pig handlers in Nigeria to detect circulating strains of influenza viruses. This would serve as an effective early warning system.Item Pattern of spread of African swine fever in south-western Nigeria, 1997-2005(2007) Olugasa, B. O.; Ijagbone, I. F.Geographic coordinates of selected pig farms with confirmed African swine fever (ASF) outbreaks in Ekiti, Lagos, Ogun, Ondo and Oyo States were used to create spatial models of pig farms and ASF outbreaks in southwestern Nigeria between 1997 and 2005. The probability of ASF virus-free pigs remaining in a non-infected state when located at various distances from ASF virus infected pigs was estimated. Movement of infected stock was the most important means of spreading the virus. The estimated mean duration of clinical signs prior to death was 3.4 ± 1.1 days (mean ± standard deviation); the mean convalescent period was 16.3 ± 2.3 days and the mean period of survival after full recovery was 1 084 ± 145.1 days. The continuous presence of recovered pigs in the population enables virus spread through trade and breeding. There is an urgent need for the implementation of an ASF eradication programme in Nigeria.