A cross-sectional cattle disease study in Kongor Rural Council, Southern Sudan. II. Brucellosis in cows: Associated factors, impact on production and disease control considerations

McDermott, John J.; Deng, Kui; Jayatileka, T.N.; Jack, M.A. El

doi:10.1016/0167-5877(87)90017-1

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…In this study, it was found that herds with a history of abortions were associated with Brucella seropositivity. This finding is in correspondence with the biology of Brucella , and similar results have been described in other field studies (McDermott et al 1987 ; Silva et al 2000 ; Al-Majali et al 2009 ; Matope et al 2011 ) and reconfirm that brucellosis in dairy cattle is not only a public health issue. It is generally acknowledged that abortions and decreasing milk yield can be of major economic importance in an infected herd (Corbel 1988 ).…”

Section: Discussionsupporting

confidence: 90%

Seropositivity and risk factors for Brucella in dairy cows in urban and peri-urban small-scale farming in Tajikistan

Lindahl

Sattorov

Boqvist

et al. 2014

Trop Anim Health Prod

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In this cross-sectional study, we assessed and mapped the seroprevalence of brucellosis in small-scale dairy farming in an urban and peri-urban area of Tajikistan and investigated factors associated with seropositivity. As urban and peri-urban farming is both an opportunity to improve the livelihood for small-scale farmers and a potential public health hazard, studies are warranted to reveal possible peculiarities in the epidemiology of brucellosis in this type of dairy farming. In total, 904 cows of breeding age belonging to 443 herds in 32 villages were serologically tested with indirect enzyme-linked immunosorbent assay (ELISA) and positive samples confirmed with competitive ELISA. Two logistic regression models were used to investigate an association between seropositivity and risk factors at herd and individual level. The herd and individual seroprevalences were 4.1 and 2.0 %, respectively. Herds with a history of abortions were found to be associated with seropositivity [odds ratio (OR) = 5.3; 95 % confidence interval (CI), 1.3–21.3]. Large herds with more than eight cattle were more likely to be seropositive compared to smaller herds with one to two cattle (OR = 13.9; 95 % CI, 1.6–119). The number of calves produced per cow (indicating age) was found to be associated with seropositivity. Younger cows with one to two produced calves were less likely to be seropositive compared to older cows with more than six produced calves (OR = 0.24; 95 % CI, 0.06–1.0). Neither introduction of new cattle to the herd nor communal grazing was associated with seropositivity. This study shows that infection with Brucella (1) is present in small-scale urban and peri-urban dairy farming in Tajikistan and (2) has significant negative effects on reproductive performance in this farming system and (3) that some previously known risk factors for seropositivity in rural farming system were absent here.

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Section: Discussionsupporting

confidence: 90%

Seropositivity and risk factors for Brucella in dairy cows in urban and peri-urban small-scale farming in Tajikistan

Lindahl

Sattorov

Boqvist

et al. 2014

Trop Anim Health Prod

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“…[25] had reported that cattle were more at risk of contracting Brucella infection than goats. Comparatively, the seroprevalence reported in cattle in this study is less compared to the 25.3% (86/340) reported by [19] and 29.3% (147/502) by [17]in South Sudan. However, another study reported a higher individual animal seroprevalence of 30.8% (88/285) and a lower herd prevalence of 77.7% compared to the findings of this study [12].…”

Section: Discussioncontrasting

confidence: 89%

“…[9,10,[13][14][15]. However, few studies have been conducted in South Sudan to assess the prevalence of brucellosis in 6 humans and cattle [16][17][18][19].These studies have reported seroprevalence of 23.2% (48/250) [17]and 23.3% (97/416) [16]in cattle and humans, respectively. There were no reported studies on brucellosis in sheep and goats.…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence and risk factors of brucellosis in pastoralists and their livestock in South Sudan

Lita,

Ochi,

Misinzo

et al. 2024

Preprint

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Author summary Brucellosis is a neglected, bacterial zoonotic disease that is caused by several species of the genus Brucella. Cross-species transmission of Brucella can occur in mixed or integrated farming systems. The disease poses serious public health implications and substantial economic losses particularly in low-income countries including South Sudan. This study was conducted to estimate the seroprevalence of brucellosis in pastoralists, their livestock as well identifying potential risk factors associated with Brucella infection. Knowledge of the seroprevalence of brucellosis and risk factors is a prerequisite towards planning an effective mitigation strategy of the disease. The study revealed high seroprevalence of brucellosis in cattle compared to goats, and the following risk factors were identified; prior history of abortion, age (old) and sex (female) significantly associated with Brucella infection. Surprisingly, sheep were found to be seronegative.

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“…The occurrence of abortion and number of young animals produced per breeding female have been regarded as reasonable indicators for productivity in livestock (McDermott et al 1987). Consequent to abortion, the number of young animals and total milk production are the two important products affected most (Olsen and Tatum 2010).…”

Section: Discussionmentioning

confidence: 99%

Seroprevalence of brucellosis and its contribution to abortion in cattle, camel, and goat kept under pastoral management in Borana, Ethiopia

Megersa

Biffa

Abunna

et al. 2010

Trop Anim Health Prod

107

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The involvement of Brucella infection in causing abortion was investigated in a breeding female subpopulation of 283 cattle, 756 camels, and 757 goats. Serum samples were serially tested using the Rose Bengal test and complement fixation test. The study showed that anti-Brucella antibodies were prevalent in 10.6% (95% confidence interval (CI), 7.4, 14.9), 2.2% (95%CI, 1.4, 3.7), and 1.9% (95%CI, 1.1, 3.2) of cattle, camel, and goats, respectively. Abortion was more commonly reported in camels (23.4%) than cattle (13.8%) and goats (12.4%). The results of this study suggested that Brucella infections contribute significantly to abortion in cattle (odds ratio (OR), = 4.7; 95%CI, 2.0, 10.8) and goats (OR = 6.9; 95%CI, 2.2, 21.7) but not in camels. The number of young animals produced by breeding females seems to be apparently reduced in seropositive groups. Keeping more than two animal species at household level was found to be the risk factor for cattle (OR = 3.1; 95%CI, 1.2, 7.9) and camel (OR = 5.3; 95%CI, 1.2-23.5) seropositivity to Brucella infection when compared to those animals from households that keep only two animal species. This may suggest a possibility of cross species transmission of Brucella infection under such mixed herding. Wet season (OR = 4.8; 95%CI, 1.3, 18.1) was found to be associated with seropositivity in goats, linked to a coincidence of increased deliveries in flocks with possible excretion of Brucella organisms. The study results suggest that Brucella infection is the likely cause of abortion in cattle and goats while other causes largely outweigh brucellosis as a cause of abortion in camels in Borana, hence, contributing to reproductive loss.

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A cross-sectional cattle disease study in Kongor Rural Council, Southern Sudan. II. Brucellosis in cows: Associated factors, impact on production and disease control considerations

Cited by 11 publications

References 4 publications

Seropositivity and risk factors for Brucella in dairy cows in urban and peri-urban small-scale farming in Tajikistan

Seropositivity and risk factors for Brucella in dairy cows in urban and peri-urban small-scale farming in Tajikistan

Seroprevalence and risk factors of brucellosis in pastoralists and their livestock in South Sudan

Seroprevalence of brucellosis and its contribution to abortion in cattle, camel, and goat kept under pastoral management in Borana, Ethiopia

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