Herd-level factors for Brucella seropositivity in cattle reared in smallholder dairy farms of Zimbabwe

Matope, Gift; Bhebhe, E.; Muma, John Bwalya; Lund, Arve; Skjerve, Eystein

doi:10.1016/j.prevetmed.2010.01.003

Cited by 67 publications

(61 citation statements)

References 16 publications

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“…The association between herd size and the presence of bovine brucellosis has been reported in previous studies (MATOPE et al, 2010;SALMAN;MEYER, 1984). In particular, herd size has been identified as a risk factor for bovine brucellosis in epidemiological surveys conducted in some Brazilian states (CHATE et al, 2009;DIAS et al, 2009b;KLEIN-GUNNEWIEK et al, 2009;NEGREIROS et al, 2009;OGATA et al, 2009;SILVA et al, 2009) and in the nationwide analysis of Brazil (MOTA et al, 2016).…”

Section: Introductionsupporting

confidence: 66%

Cattle movement network, herd size, and bovine brucellosis in the State of Mato Grosso, Brazil

Cipullo

Grisi-Filho

Dias

et al. 2016

SCA

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The aims of the present study were to compare centrality and other measures of bovine movement networks in the state of Mato Grosso, Brazil, in 2007, by examination of the positive and negative herds identified in the brucellosis survey conducted in 2003. In addition, we aimed to examine the association between herd size (measured by the number of females older than 24 months, denoted FEM24+) and animal trade between herds. We found a statistical association between brucellosis occurrence and both the total degree (number of traded animals) and out-degree (for the number of animals sold and the number of neighboring herds). This finding suggests that positive herds in the 2003 survey were trading (particularly selling) more frequently in 2007 than negative herds, thereby presumably increasing the risk of disease spread. Statistical differences observed (p-values) in the network of movements for reproduction purposes were more significant than those observed in other networks for average herd size; degrees of animals, batches, and neighbors; outdegree of neighbors; and betweenness. We found positive associations (p < 0.001) between the following variables: number of traded animals and the FEM24+ herd size; FEM24+ herd size and FEM24+ herd size of neighbors within the network of cattle movement; FEM24+ herd size of neighbors and number of traded animals; and weighted degree (animals) of neighbors and degree (animals) of the herd of origin. A comparison of positive and negative herds stratified by herd size (≤ 10 FEM24+; and > 50 FEM24+), within the network of movements for reproduction purposes, revealed significant differences (p < 0.05) in the > 50 FEM24+ category only, for average herd size, total degree (animals, batches, and neighbors), outdegree (animals, batches, and neighbors), and outcloseness. Logistic regression analysis, in which average herd size and degree (animals) were both factors, showed that a tenfold increase in herd size and the number of animals traded would lead to an increased chance of a herd being positive by 41% (OR = 1.41 [1.01; 1.99]) and 39% (OR = 1.39 [1.05; 1.85]), respectively. We concluded that the presence of bovine brucellosis is associated with a larger herd size, which is consistent with other reports. We also found an association between the increased trade of bovines and the presence of bovine brucellosis. Furthermore, an association was noted between herd size and animal trade, both of which could contribute to the spread of brucellosis. ResumoO objetivo do presente estudo foi comparar medidas de centralidade e outras medidas da rede de trânsito bovino no estado de Mato Grosso, Brasil, em 2007, pela análise de rebanhos positivos e negativos identificados no levantamento de brucelose realizado em 2003. Além disso, examinamos a associação entre tamanho de rebanho (medido pelo número de fêmeas acima de 24 meses, denotado FEM24+) e o comércio animal entre rebanhos. Foi observada uma associação estatística entre brucelose e tanto o grau total (número de animais comerci...

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Section: Introductionsupporting

confidence: 66%

Cattle movement network, herd size, and bovine brucellosis in the State of Mato Grosso, Brazil

Cipullo

Grisi-Filho

Dias

et al. 2016

SCA

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“…(Matope et al, 2010b;McDermott and Arimi, 2002;Muma et al, 2007b). Additionally, small-scale cattle farmers regularly purchase cattle from other farms where the screening of these cattle for brucellosis is not carried out due to limited availability of veterinary services and this further increases chances of contact with infected herds (Matope et al, 2010a;Muma et al, 2007b;Omer et al, 2000). Within the Lusaka province, herd level Brucella seroprevalence was relatively higher in Chongwe district compared to other study areas.…”

Section: Discussionmentioning

confidence: 96%

A comparative study of the seroprevalence of brucellosis in commercial and small-scale mixed dairy–beef cattle enterprises of Lusaka province and Chibombo district, Zambia

Chimana

Muma

Samui

et al. 2010

Trop Anim Health Prod

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“…Several risk factors for bovine brucellosis have been reported. Among these are increased herd sizes, increased age, sex of the animal, husbandry practices such as animal confinement, contact with wildlife, geographical area and keeping different breeds in a herd (Muma et al, 2007;Tolosa et al, 2010;Matope et al, 2010;Mekonen et al, 2010).…”

Section: Brucellosismentioning

confidence: 99%

Review of common causes of abortion in dairy cattle in Ethiopia

Tulu¹,

Deresa²,

Begna³

et al. 2018

J. Vet. Med. Anim. Health

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Abortion in dairy cattle may be caused by infectious and non-infectious agents. Infectious causes of abortion in dairy cattle include brucellosis, leptospirosis, listeriosis, Q fever, bovine viral diarrhea, mycotic abortion and neosporosis. Non-infectious causes of abortion in dairy cattle are genetic and non-genetic disorder. Risk factors associated with abortion in dairy cattle are genetic, environmental, management, geographical factors and infectious factors. Abortion in dairy cows brings about breeding and productive damages. Abortions cause significant economic loss to dairy farm. These losses can be attributed to loss of replacement calves, reduced milk production, costs of treatment, feeding of animals and premature culling of productive cows and heifers. Diagnosis of bovine abortion includes the collection of a complete history of the case and relevant epidemiological data and collected sample for analysis. However, determining the cause of bovine abortion is difficult as abortions are caused by numerous infectious and noninfectious factors. Status of abortion and breeds affected by abortion in Ethiopia were also reviewed.

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Herd-level factors for Brucella seropositivity in cattle reared in smallholder dairy farms of Zimbabwe

Cited by 67 publications

References 16 publications

Cattle movement network, herd size, and bovine brucellosis in the State of Mato Grosso, Brazil

Cattle movement network, herd size, and bovine brucellosis in the State of Mato Grosso, Brazil

A comparative study of the seroprevalence of brucellosis in commercial and small-scale mixed dairy–beef cattle enterprises of Lusaka province and Chibombo district, Zambia

Review of common causes of abortion in dairy cattle in Ethiopia

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