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Serological diagnosis of lentivirus infection in goats raised in Algeria
2019
Idres, Takfarinas | Lamara, Ali | Temim, Soraya | Boudjellaba, Sofiane | Gagnon, Jean | Chebloune, Yahia | Rabie Bouchama National Veterinary School of Algiers ; Partenaires INRAE | Institut National de la Recherche Agronomique (INRA) | Infections Virales et Pathologie Comparée - UMR 754 (IVPC) ; Institut National de la Recherche Agronomique (INRA)-École Pratique des Hautes Études (EPHE) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon | National Exceptional Program of the Algerian government
International audience | Introduction: Infection of goats with caprine arthritis encephalitis virus (CAEV) has been detected in variable proportions in many countries all over the world. Here, we investigated the seroprevalence of CAEV in goats raised in Algeria. Material and Methods: A serological survey was performed on serum samples from 1,313 goats, including the local breeds (Arabia and Dwarf of Kabylia) and imported European breeds (Alpine and Saanen). Blood samples were taken from goats on 38 farms distributed across four different geographical regions of Algeria. Serum samples were tested for CAEV antibodies using a commercial ELISA. Results: A total of 390 serum samples were found to be positive for CAEV, giving an overall seropositivity rate of 29.7% in individual animals and 97.37% (37/38) at the goat farm level. Conclusion: These results provide the first large-scale serological evidence for the presence of CAEV infection in both the local and imported breeds of goats raised in Algeria, indicating that the virus infection is widespread.
Show more [+] Less [-]Sheep enteric cestodes and their influence on clinical indicators used in targeted selective treatments against gastrointestinal nematodes
2019
Meradi, Salah | Cabaret, Jacques | Bentounsi, Bourhane | Université Hadj Lakhdar Batna 1 | Infectiologie et Santé Publique (UMR ISP) ; Institut National de la Recherche Agronomique (INRA)-Université de Tours (UT) | Institute of Veterinary Sciences ; Université Frères Mentouri – Constantine 1 = Constantine 1 – Frères Mentouri University (UMC)
International audience | Clinical indicators such as diarrhoea (DISCO) or anaemia (FAMACHA©) are used as a measure for targeted selective treatments against gastrointestinal nematodes (GIN). Enteric cestodes such as Moniezia may interfere directly with DISCO or indirectly with the FAMACHA© score. We investigated 821 Ouled Djellal rams naturally infected in a steppe environment (GIN alone, cestodes alone, GIN and cestodes) or not. The rams were treated with ivermectin 2 months before being slaughtered to reduce the impact of nematodes on the clinical scores; however, persistent or newly acquired GINs were not related to both scores. Of the non-infected rams (n = 296), 26% identified as needing treatment against GIN using the FAMACHA score, and 34.5% using DISCO would have been thus selected. This implies that the clinical indicators used for the targeted selective treatment of gastrointestinal nematodes are not fully reliable when a low infection is recorded and may well be influenced by confounding factors. As expected, only DISCO was affected by cestode infection, and we suggest that the presence of Moniezia should also be taken into consideration. | Des indicateurs cliniques tels que la diarrhée (DISCO) ou l'anémie (FAMACHA © ) sont utilisés comme mesure pour des traitements sélectifs ciblés contre les nématodes gastro-intestinaux (GIN). Les cestodes entériques tels que Moniezia peuvent interférer directement avec DISCO ou indirectement avec le score FAMACHA © . Nous avons enquêté sur 821 béliers Ouled Djellal naturellement infectés en milieu steppique (GIN seul, cestodes seuls, GIN et cestodes) ou non. Les béliers ont été traités à l'ivermectine 2 mois avant d'être abattus pour réduire l'impact des nématodes sur les scores cliniques ; cependant, les GIN persistants ou nouvellement acquis n'étaient pas liés aux deux scores. Parmi les béliers non infectés ( n = 296), 26% identifiés comme ayant besoin d'un traitement contre le GIN selon le score FAMACHA, et 34,5% selon DISCO auraient ainsi été sélectionnés. Cela implique que les indicateurs cliniques utilisés pour le traitement sélectif ciblé des nématodes gastro-intestinaux ne sont pas entièrement fiables lorsqu'une faible infection est enregistrée et peuvent bien être influencés par des facteurs de confusion. Comme prévu, seul DISCO a été affecté par l'infection par cestode, et nous suggérons que la présence de Moniezia soit également prise en considération.
Show more [+] Less [-]Sheep enteric cestodes and their influence on clinical indicators used in targeted selective treatments against gastrointestinal nematodes
2019
Meradi, Salah | Cabaret, Jacques | Bentounsi, Bourhane | Université Hadj Lakhdar Batna 1 | Infectiologie et Santé Publique (UMR ISP) ; Institut National de la Recherche Agronomique (INRA)-Université de Tours (UT) | Institute of Veterinary Sciences ; Constantine University 1
International audience | Clinical indicators such as diarrhoea (DISCO) or anaemia (FAMACHA©) are used as a measure for targeted selective treatments against gastrointestinal nematodes (GIN). Enteric cestodes such as Moniezia may interfere directly with DISCO or indirectly with the FAMACHA© score. We investigated 821 Ouled Djellal rams naturally infected in a steppe environment (GIN alone, cestodes alone, GIN and cestodes) or not. The rams were treated with ivermectin 2 months before being slaughtered to reduce the impact of nematodes on the clinical scores; however, persistent or newly acquired GINs were not related to both scores. Of the non-infected rams (n = 296), 26% identified as needing treatment against GIN using the FAMACHA score, and 34.5% using DISCO would have been thus selected. This implies that the clinical indicators used for the targeted selective treatment of gastrointestinal nematodes are not fully reliable when a low infection is recorded and may well be influenced by confounding factors. As expected, only DISCO was affected by cestode infection, and we suggest that the presence of Moniezia should also be taken into consideration.
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