Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar
Since its introduction in Madagascar in 1998, African swine fever (ASF) has severely affected national pig production and persists as a common disease in that country. Two of its natural hosts in the African continent, the bushpig (Potamochoerus larvatus) and tick vectors of the Ornithodoros moubata complex, are reported in west and central regions of the island. However, their role in the maintenance and transmission of the virus has been insufficiently studied. In this work, we tried to assess their potential role in the epidemiology of the disease in Madagascar, by assessing the levels of interaction between (i) ASF virus (ASFV) and bushpigs and (ii) between soft ticks and domestic and wild suids in north-western Madagascar. Twenty-seven sera and 35 tissue samples from bushpigs were collected and analysed for the presence of anti-ASF antibodies and viral DNA. In addition, the sera from 27 bushpigs and 126 domestic pigs were analysed with an ELISA test for the detection of antibodies against salivary antigens from Ornithodoros ticks. No circulation of ASFV or anti-ASFV antibodies nor anti-tick antibodies were detected in bushpigs. However, seven of the domestic pig sera (5.6% of the total sample population) were antibody positive for O. moubata antigens. The probability of freedom from ASFV in the bushpig population using Bayesian statistical methods ranged between 73% and 84%. The probabilities of absence of anti-tick antibodies in domestic and wild pigs were estimated at 63% and 71%, respectively. These preliminary results suggest that bushpigs are unlikely to play a significant role in the maintenance and transmission of ASFV in Madagascar. Nevertheless, further ASFV surveys are needed on that species to confirm this assumption. In addition, the presence of antibodies against O. moubata in domestic pigs suggests that soft ticks may be able to maintain ASFV within a domestic pig cycle in areas of Madagascar where they remain present.
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Subjects: | L73 - Maladies des animaux, peste porcine africaine, porcin, Ornithodoros moubata, http://aims.fao.org/aos/agrovoc/c_26754, http://aims.fao.org/aos/agrovoc/c_7555, http://aims.fao.org/aos/agrovoc/c_30948, http://aims.fao.org/aos/agrovoc/c_4510, |
Online Access: | http://agritrop.cirad.fr/559596/ http://agritrop.cirad.fr/559596/1/document_559596.pdf |
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dig-cirad-fr-5595962024-01-28T19:08:10Z http://agritrop.cirad.fr/559596/ http://agritrop.cirad.fr/559596/ Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar. Ravaomanana Julie, Jori Ferran, Vial Laurence, Pérez-Sánchez R., Blanco Esther, Michaud Vincent, Roger François. 2011. Transboundary and Emerging Diseases, 58 (3) : 247-254.https://doi.org/10.1111/j.1865-1682.2011.01207.x <https://doi.org/10.1111/j.1865-1682.2011.01207.x> Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar Ravaomanana, Julie Jori, Ferran Vial, Laurence Pérez-Sánchez, R. Blanco, Esther Michaud, Vincent Roger, François eng 2011 Transboundary and Emerging Diseases L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 Madagascar http://aims.fao.org/aos/agrovoc/c_4510 Since its introduction in Madagascar in 1998, African swine fever (ASF) has severely affected national pig production and persists as a common disease in that country. Two of its natural hosts in the African continent, the bushpig (Potamochoerus larvatus) and tick vectors of the Ornithodoros moubata complex, are reported in west and central regions of the island. However, their role in the maintenance and transmission of the virus has been insufficiently studied. In this work, we tried to assess their potential role in the epidemiology of the disease in Madagascar, by assessing the levels of interaction between (i) ASF virus (ASFV) and bushpigs and (ii) between soft ticks and domestic and wild suids in north-western Madagascar. Twenty-seven sera and 35 tissue samples from bushpigs were collected and analysed for the presence of anti-ASF antibodies and viral DNA. In addition, the sera from 27 bushpigs and 126 domestic pigs were analysed with an ELISA test for the detection of antibodies against salivary antigens from Ornithodoros ticks. No circulation of ASFV or anti-ASFV antibodies nor anti-tick antibodies were detected in bushpigs. However, seven of the domestic pig sera (5.6% of the total sample population) were antibody positive for O. moubata antigens. The probability of freedom from ASFV in the bushpig population using Bayesian statistical methods ranged between 73% and 84%. The probabilities of absence of anti-tick antibodies in domestic and wild pigs were estimated at 63% and 71%, respectively. These preliminary results suggest that bushpigs are unlikely to play a significant role in the maintenance and transmission of ASFV in Madagascar. Nevertheless, further ASFV surveys are needed on that species to confirm this assumption. In addition, the presence of antibodies against O. moubata in domestic pigs suggests that soft ticks may be able to maintain ASFV within a domestic pig cycle in areas of Madagascar where they remain present. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/559596/1/document_559596.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1111/j.1865-1682.2011.01207.x 10.1111/j.1865-1682.2011.01207.x http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=211169 info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1865-1682.2011.01207.x info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1111/j.1865-1682.2011.01207.x |
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L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 http://aims.fao.org/aos/agrovoc/c_4510 L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 http://aims.fao.org/aos/agrovoc/c_4510 |
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L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 http://aims.fao.org/aos/agrovoc/c_4510 L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 http://aims.fao.org/aos/agrovoc/c_4510 Ravaomanana, Julie Jori, Ferran Vial, Laurence Pérez-Sánchez, R. Blanco, Esther Michaud, Vincent Roger, François Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
description |
Since its introduction in Madagascar in 1998, African swine fever (ASF) has severely affected national pig production and persists as a common disease in that country. Two of its natural hosts in the African continent, the bushpig (Potamochoerus larvatus) and tick vectors of the Ornithodoros moubata complex, are reported in west and central regions of the island. However, their role in the maintenance and transmission of the virus has been insufficiently studied. In this work, we tried to assess their potential role in the epidemiology of the disease in Madagascar, by assessing the levels of interaction between (i) ASF virus (ASFV) and bushpigs and (ii) between soft ticks and domestic and wild suids in north-western Madagascar. Twenty-seven sera and 35 tissue samples from bushpigs were collected and analysed for the presence of anti-ASF antibodies and viral DNA. In addition, the sera from 27 bushpigs and 126 domestic pigs were analysed with an ELISA test for the detection of antibodies against salivary antigens from Ornithodoros ticks. No circulation of ASFV or anti-ASFV antibodies nor anti-tick antibodies were detected in bushpigs. However, seven of the domestic pig sera (5.6% of the total sample population) were antibody positive for O. moubata antigens. The probability of freedom from ASFV in the bushpig population using Bayesian statistical methods ranged between 73% and 84%. The probabilities of absence of anti-tick antibodies in domestic and wild pigs were estimated at 63% and 71%, respectively. These preliminary results suggest that bushpigs are unlikely to play a significant role in the maintenance and transmission of ASFV in Madagascar. Nevertheless, further ASFV surveys are needed on that species to confirm this assumption. In addition, the presence of antibodies against O. moubata in domestic pigs suggests that soft ticks may be able to maintain ASFV within a domestic pig cycle in areas of Madagascar where they remain present. |
format |
article |
topic_facet |
L73 - Maladies des animaux peste porcine africaine porcin Ornithodoros moubata http://aims.fao.org/aos/agrovoc/c_26754 http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_30948 http://aims.fao.org/aos/agrovoc/c_4510 |
author |
Ravaomanana, Julie Jori, Ferran Vial, Laurence Pérez-Sánchez, R. Blanco, Esther Michaud, Vincent Roger, François |
author_facet |
Ravaomanana, Julie Jori, Ferran Vial, Laurence Pérez-Sánchez, R. Blanco, Esther Michaud, Vincent Roger, François |
author_sort |
Ravaomanana, Julie |
title |
Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
title_short |
Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
title_full |
Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
title_fullStr |
Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
title_full_unstemmed |
Assessment of interactions between African swine fever virus, bushpigs (Potamochoerus larvatus), Ornithodoros ticks and domestic pigs in north-western Madagascar |
title_sort |
assessment of interactions between african swine fever virus, bushpigs (potamochoerus larvatus), ornithodoros ticks and domestic pigs in north-western madagascar |
url |
http://agritrop.cirad.fr/559596/ http://agritrop.cirad.fr/559596/1/document_559596.pdf |
work_keys_str_mv |
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