Browsing by Author "Muhairwa, A.P"

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The effect of concurrent infections with pasteurella multocida and ascaridia galli on free range chickens
(Elsevier, 2002-01-26) Dahl, C.; Permin, A; Christensen, J.P; Bisgaard, M; Muhairwa, A.P; Petersen, K.M.D; Poulsen, J.S.D; Jensen, A.L
Pasteurella multocida and Ascaridia galli are observed with high prevalences in free range chickens in Denmark, but the impact is unknown. A study was carried out to examine the interaction between A. galli and P. multocida in chickens and the impact on production. Five groups, each with 20 18-week-old Lohmann Brown chickens were infected. Group 1 was orally infected with 1000 50 embryonated A. galli eggs. Group 2 received 10 4 cfu P. multocida intratracheally. Group 3 was infected with A. galli and subsequently with P. multocida. Group 4 was infected with P. multocida followed by A. galli. Group 5 was the control. The study ran for 11 weeks where clinical manifestations, weight gain and egg production were recorded. Excretion of P. multocida was determined on individual basis and blood smears were made for differential counts. At the end of the study pathological lesions and the number of adult worms, larvae and eggs in the faeces were recorded. The birds were more severely affected when infected with both pathogens compared to single infections with A. galli or P. multocida, respectively. A lower weight gain and egg production was observed with dual infections. A. galli infection followed by a secondary P. multocida infection resulted in more birds with pathological lesions and continued P. multocida excretion. In conclusion a negative interaction between A. galli and P. multocida was observed and it is postulated that free range chickens are at higher risk of being subjected to outbreaks of fowl cholera when they are infected with A. galli. # 2002 Elsevier Science B.V. All rights reserved.
Eimeriosis in dairy cattle farms in Morogoro municipality of Tanzania
(Elsevier Science B.V., 1996-10) Muhairwa, A.P; Chibunda, R.T; Kambarage, D.M; Mtambo, M.M.A; Kusiluka, L.J.M; Kazwala, R.R
Coccidial oocysts were detected in 35% of 445 cattle in four medium-scale and 20 small-scale dairy farms in Morogoro municipality, Tanzania. The highest prevalence (56%) was observed in animals aged between 5 and 18 months, whereas lower prevalences were observed in calves (29%) aged between 12 days and 4 months and adults (30%). No coccidial oocysts were detected in calves less than 12 days old. The oocyst output was high in calves, followed by weaners; adults had the lowest oocyst output. The number of oocysts per gram of faeces was significantly higher (P < 0.001) in diarrhoeic animals than in non-diarrhoeic animals, and more so in young calves. Eimeria species infecting the animals included Eimeria bovis (68%) and Eimeria zuemii (57%), Eimeria ellipsoidalis (25%), Eimeria cylindrica (23%), Eimeria aubumensis (22%), Eimeria alabamensis (12%) and Eimeria subspherica (5%). Mixed infections involving two or three species were common. Our findings indicate that eimeriosis is common in cattle in Morogoro municipality. Published by Elsevier Science B.V.
Factors lowering levels of rabies vaccination: a case of Kibaha town District of Tanzania
(Tanzania Veterinary Journal, 2019) Chikoondo, F. M; Majid, K.S; Muhairwa, A.P; Mpelumbe-Ngeleja, C.A.R
A study was conducted in Kibaha Town Council of Pwani Region of Tanzania to survey the probable factors that negatively affected the anti-rabies vaccinations leading to low percent coverage in some selected wards. The data used in this study were gathered from households keeping dogs and cats and institutions, using a semi-structured questionnaire and interviews. Another set of data was the record of the rabies control programme at the district veterinary office. Analysis of the data was done using SPSS.16, Microsoft Excel 2007 and EpiInfo TM 7. The enquiry instrument centred on three main fields, namely, knowledge of respondents about rabies, responsible dog ownership and their perception of issues pertaining to the conduct of the rabies control programme. The results showed that the last round of vaccination covered dogs for 57% of the sampled households in the selected wards. A huge percentage of the respondents (64%) kept the wrong perception that clinical rabies could be cured. Only 34% of the respondents indicated that they had been taught about rabies in a WHO project area. It was also learnt that there was an outbreak of rabies in the district after 2 years of consecutively vaccinating the dogs in the area. The Chi- square test for linear trends showed very highly significant statistical differences in the progression of numbers of dogs vaccinated over the years (p<0.05; = 0.0000). This study concludes that, lack of sufficient knowledge on rabies and negative attitude towards the control programme were the biggest drawbacks on the vaccination coverage.
Helminthosis in local and cross-bred pigs in the Morogoro region of Tanzania
(Elsevier, 1997-01) Muhairwa, A.P; Mtambo, M.M.A; Kambarage, D.M; Elsrony, K; Kusiluka, L. J. M
We investigated the prevalence, burden and types of gastro-intestinal helminths in 424 local and cross-bred pigs kept under different management systems in two climatic zones in the Morogoro region of Tanzania. Coprological examination revealed that 53% of the pigs excreted hehninth eggs in their faeces. The median eggs per gram of faeces (EPG) was 500 (range 100-22000). Local breeds in the Mgeta location with tropical highland climate showed signifi- cantly higher prevalence (P < 0.001) and median EPG values ( P < 0.001) than the cross-bred animals in the semi-arid area. There was no significant difference in the prevalence (P = 0.90) of helminth infection and egg outputs (P = 0.78) in cross-bred pigs raised under the small-scale and semi-mtensive management systems in the semi-arid zone. Piglets showed significantly lower prevalence of helminthosis (P < 0.001) than the weaners, growers and adults in both local and cross-bred animals. Median EPGs of growers and adult animals were significantly higher than those of piglets and weaners (P = 0.006). The prevalences of various hehninth species were Oesophagostomum sp. (40%), Ascaris suum (12%), Strongy loides ransomi (9% ) and Trichuris suis (St% ). 0 1997 Elsevier Science B.V.
Isolation of vancomycin-resistant Enterococcus from apparently healthy human animal attendants, cattle and cattle wastes in Tanzania
(2018-01) Muhairwa, A.P; Lupindu, A.M; Madoshi, B.P; Mtambo, M.M.A; Olsen, J.E
Aim: The study aimed to isolate and characterize Enterococcus species from apparently healthy waste attendants, cattle and cattle waste in Tanzania. Emphasis was given to antimicrobial resistance and in particular occurrence of vancomycin (VA)-resistant enterococci. Methods and Results: Faecal samples were collected from healthy cattle, cattle waste attendants and cattle house wastes, and isolation of Enterococcus species was performed using Slanetz Bartley agar. Isolates were characterized with regard to species, antimicrobial susceptibility and presence of VA resistance genes. Enterococcus faecalis was the most prevalent species from all sources of isolation (43 5%), followed by Enterococcus faecium (38 4%). Isolates of E. faecium showed a higher number of phenotypic antimicrobial resistance than isolates of E. faecalis. Fifty-eight isolates, which showed resistance or intermediate resistance to VA by disc diffusion test, were analysed for VA- resistant Enterococcus (VRE) by PCR. The vanA gene was detected in 14 isolates of E. faecium and 12 isolates of E. faecalis, while vanB was detected in three isolates. No isolates were found to carry vanC1-gene. Conclusion: VRE was detected in both human and cattle samples, despite no known use of antimicrobial agents that can select for VRE in livestock in Tanzania. Enterococcus faecalis was the most commonly isolated species from cattle and humans. Significance and Impact of the Study: The study provides information on the prevalence of VRE in human and nonhuman samples in Tanzania calling for further studies on the origin of VRE in such isolates, since no selection mechanism in Tanzania are known.