Browsing by Author "Mellau, L.S.B."

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Retrospective study on sero-epidemiology of peste des petits ruminants before its official confirmation in Northern Tanzania in 2008
(Roavs, 2011) Karimuribo, E.D.; Loomu, P. M.; Mellau, L.S.B.; Swai, E.S.
A retrospective sero-epidemiological investigation of Peste des petits ruminants (PPR) was carried out in Ngorongoro district, situated in northern part of Tanzania and bordering Kenya. The study involved collection of field information from 101 respondents who own goats and sheep in four villages which had experienced a ‘rinderpest-like’ syndrome in domestic small ruminants between first suspected cases of PPR in 1995 and official confirmation of the disease in Tanzania in 2008. A total number of 198 serum samples from goats and sheep collected in 1998 and 2004 for different research projects or suspected disease investigation were retrieved from the Veterinary Investigation centre (VIC) Arusha and subjected to competitive ELISA test for detecting antibodies to PPR virus. Findings of this study suggest that PPR was in northern Tanzania at least four years before official confirmation and reporting based on clinico-pathological grounds, local field-based reports from livestock field officers and District Veterinary Officer. The seroprevalence of PPR from 198 serum samples analysed was 12.6% with the serum samples collected from suspected PPR cases showing significantly (p=0.000) higher seroprevalence (71.4%) than that in samples collected for investigation of other diseases (5.7%). Interviewed farmers were aware of PPR including clear description of clinical signs of the disease. Although farmers were aware of efforts made to control the disease, only 32% of them had their animals vaccinated against PPR. The low vaccination coverage suggests continued prevalence of PPR in the study area. It is concluded that there is limited capacity with respect to veterinary disease surveillance, reporting and control of transboundary and emerging diseases which need to be addressed in the country.
A slaughterhouse survey of lung lesions in slaughtered stocks at Arusha, Tanzania
(Elsevier, 2010) Mellau, L.S.B.; Nonga, H.E.; Karimuribo, E.D.
An abattoir survey was conducted on clinically healthy 115,186 cattle, 61,551 sheep and 37,850 goats slaughtered in Arusha municipality, Tanzania, between 2005 and 2007. The objective was to determine the prevalence of disease conditions affecting the lungs. Routine meat inspection procedures were used to detect the presence of the pathological lesions. A total of 15,245 (13.2%), 4668 (7.8%) and 3192 (8.4%) lungs of cattle, sheep and goat, respectively, were condemned due to nine diseases/conditions namely pneumonia, hydati- dosis, emphysema, abscesses, anthracosis, pleurisy, calcified cysts, melanosis and bovine pulmonary tuberculosis. Pneumonia was the leading cause of condemnations as it was responsible for 4594 (30.1%), 1495 (31.4%) and 1072 (33.6%) of all the condemned lungs in cattle, sheep and goats, respectively. Anthracosis, pleurisy, melanosis and pulmonary tuberculosis were only recorded in cattle attributing to 7.3%, 6.4%, 2.9%, and 0.7% of lung condemnations, respectively. The percentages of lung conditions recorded in 2005, 2006 and 2007 were not statistically different (P > 0.05) among cattle, sheep and goats. The differ- ent lung lesion percentages recorded in cattle were significantly higher (P < 0.05) compared to sheep and goats. There were no significant (P > 0.05) variations between lung condemna- tion percentages due to various diseases during the rainy and dry seasons. Because of their zoonotic nature, occurrence of hydatidosis and tuberculosis may pose a public health risk. The study showed that different lung diseases/lesions in domestic ruminants are prevalent in Tanzania. Thus, there is a need to introduce appropriate control measures of diseases affecting lungs to minimize the rate of infection and reduce the ensuing economic losses. The data obtained from this survey cannot be wholly relied upon as accurate, but it can be used as a baseline for more extensive epidemiological investigations.