Prevalence of the main infectious causes of abortion in dairy cattle in Algeria

Derdour, Salima-Yamina; Hafsi, F.; Azzag, Naouelle; Tennah, Safia; Laamari, A.; China, Bernard; Ghalmi, Farida

doi:10.1515/jvetres-2017-0044

Cited by 51 publications

(44 citation statements)

References 37 publications

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“…This results also in agreement with [54] and [40] in which ndings shows that there was signi cant association between abortion and seropositivity with OR = 14.21 and OR = 6.33, respectively. In this study, the higher seroprevalence was observed in cows with history of repeat breeder compared to the cows with history of no reproductive problem 25.0% (8.7-49.1); P < 0.05) and repeat breeder were seven times (adj OR: 6.95; p = 0.007) more likely to be infected than animals with no history of reproductive problem, which were higher than reports from [26].…”

Section: Discussionsupporting

confidence: 91%

Seroprevalence of Bovine Viral Diarrhea Virus (BVDV) and Its Associated Risk Factors in Dairy Cattle in and Around Assela Town, South East Ethiopia

Asnake¹,

Lemma²,

Tesfaye³

et al. 2020

Preprint

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Background: Bovine viral diarrhea (BVD) is one of the most economically important diseases of cattle population worldwide and caused by Bovine viral diarrhea virus (BVDV). A cross-sectional study was conducted from October, 2019 to April, 2020 to investigate the sero-prevalence and associated risk factors for Bovine Viral Diarrhea Virus (BVDV) infection. in and around Asella town, Ethiopia. Semi structured questionnaire survey was designed to assess the different variables related to herd managements through personal interview of the farmers. Serum samples were collected from a total of 45 non-vaccinated cattle herds (225 individual cattle) during the study period. Samples were examined for detection of bovine viral diarrhea virus (BVDV) antibodies using indirect enzyme-linked immunosorbent assay (iELISA) kit (ID Screen® BVD p80 Antibody) following the manufacturers protocol. Chi-square analysis and multivariable logistic regression model were used to identify risk factors for BVDV seropositivity. Results: In the present study, 8.4% (95% CI: 5.2-12.9) and 22.2% (95% CI: 11.2-37.1) seroprevalence of BVDV antibody was observed at individual and herds level, respectively. Among the animal and management risk factors observed in multiple logistic regression analysis, higher seroprevalence of was observed in cows with history of abortion 53.8% (95% CI: 25.1-80.8%), cattle reared in semi intensive farming system 28.3% (95% CI: 16.0-43.5) (P<0.05). In this study, abortion (adjusted OR: 30.5, P<0.05), repeated breeder (adjusted OR: 6.95, P<0.05) and intensive farming systems (adjusted OR: 0.13, P<0.05) were identified as potential variables for the seroprevalence of BVDV. Conclusion: The study revealed immense exposure of cattle in and around Asella town to BVDV infection that varied with reproductive problem and farming system of the animals. Further studies will be required to elucidate the molecular epidemiology of BVDV infection in cattle and other livestock species in the study area.

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Section: Discussionsupporting

confidence: 91%

Seroprevalence of Bovine Viral Diarrhea Virus (BVDV) and Its Associated Risk Factors in Dairy Cattle in and Around Assela Town, South East Ethiopia

Asnake¹,

Lemma²,

Tesfaye³

et al. 2020

Preprint

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“…From these results, we concluded that there was a clear association between S. Dublin seropositivity and the presence of abortions. A similar study carried out on cattle from the Algiers region, also demonstrated the existence of a close relationship between S. Dublin seropositivity and presence of abortions with an Odds ratio of 14.12, an exposure rate of 4.9% for the case farms, and 0.4% for the control farms (70). Indeed, several other studies have demonstrated the abortive effect of S. Dublin in cows (4,58,(71)(72)(73)(74).…”

Section: Results Of Survey With Respect To Immunological Results Of S Dublin In Milk At Individual Cattle Levelmentioning

confidence: 55%

Salmonella Dublin associated with abortion in dairy cattle in Algiers and comparison of different diagnostic methods

Hezil¹,

Zaidi²,

Benseghir³

et al. 2021

Af J Clin Exp Micro

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Background: In cattle, many serotypes of Salmonella enterica are responsible for a wide variety of clinical manifestations, which can cause considerable economic loss. Some serotypes can cause cows to abort sporadically, such as the Dublin serotype. This study was carried out on different cattle farms in the Algiers region to determine the prevalence of Salmonella Dublin using bacteriological and immunological methods.Methodology: The prevalence of Salmonella was determined by bacteriological analysis in accordance with the reference method AFNOR NF U 47-100 on faecal samples collected from 184 cattle belonging to 19 different farms, and serotyping for S. Dublin. Immunological analysis by enzyme-linked immunosorbent assay (ELISA) for S. Dublin was carried out on milk samples collected from 91 cattle. A survey of case (n=5) and control (n=14) farms for comparative analysis was performed to demonstrate a link between abortion in cows and prevalence of S. Dublin with both bacteriological and immunological methods. Sensitivity, specificity, Cohen Kappa coefficient, McNemar test odds ratios, and confidence intervals were calculated using Winepiscope 2.0 and StatA 9.1 software,and p<0.05 was considered as statistically significant.Results: The bacteriological results showed a prevalence of 7.6% (95%CI: 3-10), for Salmonella and serotyping revealed a prevalence for S. Dublin of 2.7%. The immunological analysis of milk by the ELISA technique revealed a prevalence of 13.2% (95%CI: 5-20) for S. Dublin. The comparative study between immunological results from milk and bacteriological results from faeces for detecting S. Dublin showed poor agreement between the two tests (k=0.25), with enzyme immunoassay being significantly more sensitive than the bacteriological test (p<0.05). The results of the survey did not demonstrate a clear association between bacteriological detection of S. Dublin in faeces and abortion in cows (OR=8.66, 95%CI: 0.58-130.12). However, with the immunological analysis of milk for S. Dublin, there was a significant positive association (OR=62.33, 95%CI: 2.13-18.22) between a positive antibody response to S. Dublin in milk and the presence of abortions on the farm.Conclusion: In view of these results, we can conclude that Salmonella infections should systematically feature in the differential diagnosis of abortions in dairy cattle in Algeria. Keywords: S. Dublin, cattle, faeces, milk, abortion, immunology, bacteriology, Algiers

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“…The high BoHV-1 seroprevalences found in this study indicate the wide distribution of the virus in all rural districts of northeast of Algeria. High seroprevalence for the BoHV-1 infections was also reported in other parts of Algeria [5]. Animals with antibodies to BoHV-1 may be infected through respiratory or reproductive tract, indicating the need to establish prevention and control measures between animals of the same region and among regions.…”

Section: Discussionmentioning

confidence: 81%

“…It is difficult to make an accurate estimation of the real economic impact of the BoHV-1 because of the absence of clinical signs in latently infected animals. Previous studies showed the widespread of BoHV-1 in Algeria (e.g., [5]) with a possible variation of the prevalence status between regions and from place to place. The BoHV-1 associated risk factors possibly vary from farm-to-farm, place-to-place, and region-to-region because of the number of animals, uneven husbandry, microclimatic differences, and other circumstances [17].…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence and risk factors associated with bovine herpesvirus 1 in Northeast of Algiers

et al. 2019

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Objective: The present study was conducted to estimate the seroprevalence and associated risk factors of bovine herpesvirus 1 (BoHV-1) in a dairy herd in the northeast of Algiers, Algeria. Materials and methods: The target area is in the northeast of Algiers with humid to semi-dry climate and known for its economically important production of cattle. A total of 1,066 randomly selected individual blood samples of dairy herd collected at 120 dairy farms from rural districts of northeast of Algiers were evaluated with antibodies against BoHV-1 using commercial enzyme-linked immunosorbent assay kits, to determine the BoHV-1 infection status of the herds. A questionnaire submitted to the farmers during collection of the blood samples was used to collect data on potential BoHV-1 associated risk factors. Results: In the present study, the estimated farm and individual animal BoHV-1 seroprevalence levels were 58.33% and 14.16%, respectively. A logistic regression analysis of the random-effects model revealed that the significant associated risk factors for the present farm and individual animal seroprevalence levels were rural district, cattle introduced to the farm, region, and hygiene. Conclusion: This study found higher seroprevalence of BoHV-1 in the northeast of Algiers. The results could be used in designing the prevention and control strategy of BoHV-1 in the northeastern part of Algeria.

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Prevalence of the main infectious causes of abortion in dairy cattle in Algeria

Cited by 51 publications

References 37 publications

Seroprevalence of Bovine Viral Diarrhea Virus (BVDV) and Its Associated Risk Factors in Dairy Cattle in and Around Assela Town, South East Ethiopia

Seroprevalence of Bovine Viral Diarrhea Virus (BVDV) and Its Associated Risk Factors in Dairy Cattle in and Around Assela Town, South East Ethiopia

Salmonella Dublin associated with abortion in dairy cattle in Algiers and comparison of different diagnostic methods

Seroprevalence and risk factors associated with bovine herpesvirus 1 in Northeast of Algiers

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