Veterinary Services'use of the Global Burden of Animal Diseases to prioritise interventions, monitor impact and develop critical competencies.

Attracting and sustaining investment in Veterinary Services and animal health programmes from national government budgets, development aid and grants, and philanthropic donors requires economic rationale using relevant, reliable and validated analytical approaches. The complex interwoven relationships between animal health, livestock husbandry systems, national food security, global health security and environmental sustainability emphasise the importance of improving data governance and stewardship and applying economic analysis to understand animal disease burdens. These efforts should enable prioritised investment of limited resources and effective monitoring of the impact of programmes over time. Data governance and stewardship capacities are fundamental to development, implementation and performance monitoring of evidence-based policies in animal health. There are challenges in data availability for national and subnational livestock populations in different sectors, for disease incidence and prevalence, and for animal health expenditure in support of optimised allocation of scarce resources, be they finance, land, labour, or management attention and policy focus. Animal health data systems governance and stewardship and economic analysis are core skills for Veterinary Services in developing and applying evidence-based policy, but capability probably varies among World Organisation for Animal Health (WOAH) Members. The WOAH Performance of Veterinary Services programme has several critical competencies that are relevant to economics of animal health and to data governance and stewardship, but these have not yet been targeted for coordinated capacity development. Implementation of publicâ€"private partnership approaches for animal health programmes creates increasing expectations of robust data and methods for prioritisation, options analysis, and assessing impacts and costs. Experience and examples from national systems in New Zealand, Australia, Ethiopia and Indonesia illustrate current challenges associated with prioritisation of animal health programmes using economic analysis. The Global Burden of Animal Diseases programme intends to support WOAH Members and partners to develop capacities for and standardise approaches to economic analysis and prioritisation in animal health programmes.

Les investissements dans les Services vétérinaires et dans les programmes de santé animale à partir des budgets publics nationaux, des aides et subventions au développement et des fonds alloués par des donateurs philanthropiques peuvent être encouragés et pérennisés au moyen d'une argumentation économique solide fondée sur des méthodes analytiques pertinentes, fiables et validées. La complexité et l'imbrication des relations entre la santé animale, les systèmes d'élevage, la sécurité de l'approvisionnement alimentaire à l'échelle nationale, la sécurité sanitaire mondiale et la durabilité environnementale imposent d'améliorer la gouvernance et la gestion des données et de recourir à des analyses économiques pour mieux comprendre l'impact des maladies animales. Ces efforts devraient permettre de définir les investissements prioritaires dans un contexte de ressources limitées et d'assurer un suivi efficace de l'impact des programmes dans le temps. L'existence de capacités de gouvernance et de gestion des données est donc une condition essentielle pour concevoir et mettre en oeuvre des politiques de santé animale fondées sur des données factuelles et pour suivre leurs performances. Les données disponibles sur les populations d'animaux d'élevage des différentes filières aux niveaux national ou infranational, sur l'incidence et la prévalence des maladies ou sur les dépenses de santé animale sont parfois insuffisantes pour étayer une utilisation optimale de ressources limitées, qu'il s'agisse de moyens financiers, des terres, de la main-d'oeuvre, voire des efforts de gestion ou de la volonté politique. La gouvernance et la gestion des systèmes de données de santé animale et la conduite d'analyses économiques sont des compétences cruciales des Services vétérinaires, que ceux-ci mobilisent pour concevoir et mettre en oeuvre des politiques fondées sur des données factuelles ; il est néanmoins peu probable que ces capacités soient d'un niveau homogène parmi tous les Membres de l'Organisation mondiale de la santé animale (OMSA). Le Processus d'évaluation de la Performance des Services vétérinaires mis en place par l'OMSA définit un certain nombre de compétences critiques dans le domaine de l'économie de la santé animale et de la gouvernance et gestion des données, mais ces compétences n'ont pas encore été intégrées dans un effort coordonné de renforcement des capacités. Les stratégies consistant à confier la mise en oeuvre de programmes de santé animale à des partenariats public-privé suscitent des besoins accrus en données et en méthodes robustes pour l'établissement des priorités, l'analyse des options et l'évaluation des impacts et des coûts. Les auteurs mentionnent les expériences et exemples de systèmes nationaux en Nouvelle-Zélande, en Australie, en Ethiopie et en Indonésie pour illustrer les enjeux actuels liés à l'utilisation des analyses économiques pour définir les priorités des programmes de santé animale. Le programme " Impact mondial des maladies animales " vise à aider les Membres et les partenaires de l'OMSA à renforcer leurs capacités dans le domaine de l'analyse économique et de la définition des priorités des programmes de santé animale et à normaliser leurs approches en la matière.

Para atraer y mantener las inversiones en los Servicios Veterinarios y los programas de sanidad animal procedentes de los presupuestos de los gobiernos nacionales, la ayuda para el desarrollo y las subvenciones, así como de donantes filántropos, se requiere un razonamiento económico en el que se utilicen enfoques analíticos pertinentes, fiables y validados. Las complejas relaciones entre la sanidad animal, los sistemas de ganadería, la seguridad alimentaria nacional, la seguridad sanitaria mundial y la sostenibilidad ambiental ponen de relieve la importancia de mejorar la gobernanza y la gestión de datos y de aplicar el análisis económico para comprender el impacto de las enfermedades animales. Estos esfuerzos deberían permitir establecer prioridades para la inversión de los limitados recursos y realizar un seguimiento eficaz de las repercusiones de los programas a lo largo del tiempo. Las capacidades de gobernanza y gestión de datos son fundamentales para el desarrollo y la implementación de políticas de sanidad animal con una base empírica y para el seguimiento de sus resultados. Existen dificultades en cuanto a la disponibilidad de datos sobre las cabañas ganaderas nacionales y subnacionales de los distintos sectores, la incidencia y prevalencia de las enfermedades y el gasto en sanidad animal que plantean problemas a la hora de optimizar la asignación de unos recursos que son escasos, ya sean los recursos financieros, las tierras, la mano de obra o la atención a la gestión y la orientación de las políticas. La gobernanza y la gestión de los sistemas de datos zoosanitarios y el análisis económico son competencias esenciales para que los Servicios Veterinarios elaboren y apliquen políticas con base empírica, pero es probable que la capacidad varíe entre los Miembros de la Organización Mundial de Sanidad Animal (OMSA). El Proceso de Prestaciones de los Servicios Veterinarios de la OMSA abarca varias competencias esenciales que son relevantes para la economía de la sanidad animal y para la gobernanza y la gestión de datos, pero que aún no han sido objeto de actividades coordinadas de desarrollo de capacidades. La aplicación de enfoques de asociación público-privada para los programas de sanidad animal aumenta aún más las expectativas de datos y métodos sólidos para el establecimiento de prioridades, el análisis de opciones y la evaluación de las repercusiones y los costos. La experiencia y los ejemplos de los sistemas nacionales de Nueva Zelanda, Australia, Etiopía e Indonesia ilustran los retos actuales asociados al establecimiento de prioridades en los programas de sanidad animal mediante el análisis económico. El programa sobre el impacto global de las enfermedades animales pretende ayudar a los Miembros y socios de la OMSA a desarrollar capacidades y armonizar enfoques para el análisis económico y el establecimiento de prioridades en los programas de sanidad animal.

Seroepidemiological survey of trypanozoon infection in horses in the suspected dourine-infected Bale highlands of the Oromia region, Ethiopia.

This paper presents the results of a seroepidemiological survey of trypanozoon infection in horses carried out between September 2007 and June 2008. The survey was conducted to determine the seroprevalence of anti-trypanozoon antibodies in 880 serum samples collected randomly from selected horse-breeding districts of the Bale highlands of Ethiopia. The seroprevalence of trypanozoon infection was found to be 173 (19.66%) and 140 (15.91%) for the CATT/T. evansi and LATEX/T. evansi tests, respectively. The high seroprevalence of trypanozoon infection strongly indicates that the infection is endemic. Neither test can differentiate between anti-trypanozoon antibodies caused by infection with T. equiperdum (the causative agent of dourine) and those of T. evansi (the causative agent of surra). The findings of the present study suggest that field-applicable screening serological tests such as the CATT/T. evansi and LATEX/T. evansi could be useful for epidemiological studies and the control of trypanozoon infection.

Gastrointestinal nematodes in dogs from Debre Zeit, Ethiopia.

The study was conducted during the period between January 2005 and June 2006 to determine the frequency of gastrointestinal (GI) nematode infections of dogs in and around Debre Zeit, using qualitative and quantitative coprological (N = 100) and postmortem examinations (N = 20). By coproscopy 51% dogs were positive for different types of nematodal eggs, out of which 23.5% were with mixed infections. On necropsy 95% animals were found positive for adult parasites, of which 31.6% were showing more than one species of adult nematodes. The coproscopical examination revealed 32% infection with Ancylostoma caninum followed by Toxocara canis (21%), Spirocerca lupi (7%) and Trichuris vulpis (3%), while postmortem examination showed 70, 45, 23.5 and 5% infection, respectively. The study further indicated significant difference (P < 0.05) in overall frequency of GI nematode infections among different age groups but no difference (P > 0.05) between sexes.

Distribution of brucellosis among small ruminants in the pastoral region of Afar, eastern Ethiopia.

A cross-sectional study was conducted in the pastoral region of Afar, in eastern and central Ethiopia, to determine the distribution of brucellosis in small ruminants. Between December 2005 and June 2006, 1,568 serum samples were taken: 563 samples from sheep and 1,005 from goats. One hundred and forty-seven of these (9.4%) tested positive using the Rose Bengal plate test (RBPT), and 76 (4.8%) also tested positive by the complement fixation test (CFT). Brucellosis was detected in all five administrative zones of the region. The difference in prevalence (P) among the zones was not statistically significant (P > 0.05). The seroprevalence of Brucella infection was found to be 5.8% (n = 58) in goats and 3.2% (n = 18) in sheep. A prevalence rate of 5.3% was observed in adult animals and 1.6% in younger sheep and goats. Caprine species (chi2 = 5.56) and adult goats and sheep (chi2 = 4.84) were found to be at higher risk of Brucella infection (P < 0.05). No statistically significant difference was found between males and females (chi2 = 2.57, P > 0.05). The study showed that small-ruminant brucellosis is a widely distributed disease in Afar. The authors recommend the implementation of well-organised disease control and prevention methods to mitigate the economic losses and public health hazard caused by the disease.

Detection of African animal trypanosomes: the haematocrit centrifugation technique compared to PCR with samples stored on filter paper or in DNA protecting buffer.

The present study aimed at comparing the trypanosome specific 18S-PCR-RFLP using samples stored either on Whatman filter papers (PCR-RFLP-fp) or in a commercial cell lysis and DNA protecting buffer (PCR-RFLP-pb) with the haematocrit centrifugation technique (HCT), a method widely used for the diagnosis of African Animal Trypanosomosis. Out of 411 head of cattle, 49 (11.92%) (CI=8.95-15.45) scored positive for the presence of trypanosomes by HCT whereas 75 (18.25%) (CI=14.63-22.33) and 124 (30.17%) (CI=25.77-34.86) scored positive using PCR-RFLP-fp and PCR-RFLP-pb, respectively. Out of the 49 positives by HCT, 14 (28.57%) (CI=16.58-43.26) and 28 (57.14%) (CI=42.21-71.18) were concordant by PCR-RFLP-fp and PCR-RFLP-pb, respectively. None of the PCR techniques detected parasites from the Trypanozoon group. Although HCT detected more cases of Trypanosoma vivax (33), species identification using PCR-RFLP-fp and PCR-RFLP-pb were significantly different (p<0.001) from the HCT technique. The use of DNA protective buffer is thus recommended as the output of the PCR-RFLP-pb is improved and the risk of contamination between samples is reduced.

Ghibe river basin in Ethiopia: present situation of trypanocidal drug resistance in Trypanosoma congolense using tests in mice and PCR-RFLP.

A cross-sectional study was carried out in the Ghibe valley from August to October 2010. 411 head of cattle were sampled in eight villages for buffy coat examination (BCE) and blood spots were collected from each animal for trypanosomose diagnosis by 18S-PCR-RFLP and diminazene aceturate (DA) resistance by Ade2-PCR-RFLP. Three villages were selected in a zone where trypanosomosis control operations are currently on-going whereas the other 5 villages were located outside these control operations. Twenty-four samples (5.84%) were diagnosed positive for Trypanosoma congolense by BCE and injected in mice for further characterization. Twelve of those isolates successfully multiplied in mice and were tested by an in vivo mouse test for diminazene (DA) (10 and 20mg/kg B.W.) and isometamidium (ISM) (1mg/kg B.W.) resistance. All were shown to be resistant to both drugs at all doses. The use of the Ade2-PCR-RFLP on these isolates confirmed their DA-resistance profile. Seventy-three of the collected blood spots (17.8%) were diagnosed positive for T. congolense by 18S-PCR-RFLP of which 37 (50.7%) gave amplification products with the Ade2-PCR-RFLP. Here, 35 (94.6%) showed a resistant profile, 1 (2.7%) a sensitive profile and 1 (2.7%) a mixed profile. The data were analysed by logistic regression model and the relapsing time in mice tests was assessed using the Cox regression model. There was no significant intervention effect (P=0.83) with odds ratio equal to 1.21 when using the BCE data. 18S-PCR-RFLP test also showed no significant intervention effect (P=0.60) with odds ratio equal to 1.43. The hazard ratio of getting parasitaemic after treatment with DA at 20mg/kg B.W. compared to the control group was 0.38 which differs significantly from one (P<0.001). Relapsing time after treatment with DA 10mg/kg B.W. or ISM 1mg/kg B.W. was also significantly longer than the prepatent period of the control group. The situation of drug resistance in the Ghibe valley is further discussed.

Efficacy of Cymelarsan and Diminasan against Trypanosoma equiperdum infections in mice and horses.

Trypanocidal sensitivity studies were conducted to assess the efficacy of Diminazene diaceturate (Diminasan) and Bis (aminoethylthio) 4-melaminophenylarsine dihydrochloride (Cymelarsan) against Trypanosoma equiperdum (isolated from two mares with chronic cases of dourine) 713/943 and 834/940 Dodola strains in experimentally infected mice and horses. Diminasan at doses from 3.5 mg/kg to 28 mg/kg and Cymelarsan at doses of 0.25 mg/kg and 0.5 mg/kg body weight failed to cure any of the mice, indicating a clear dose dependent relationship in the mean time of relapse observed in mice. Indeed, mice treated with lower doses relapsed after a shorter time than mice treated with higher doses. However, mice treated with Cymelarsan at doses of 1.0 mg/kg and 2.0 mg/kg body weight were cured and no parasitemia was observed for 60 days. The efficacy of Cymelarsan was also tested in horses. Two groups of horses containing two animals each were infected with T. equiperdum 834/940 Dodola strain and treated with Cymelarsan at a dose rate of 0.25 mg/kg and 0.5 mg/kg, respectively. Cymelarsan at 0.25 mg/kg and 0.5 mg/kg body weight cleared parasitemia within 24 h post treatment and none of the animals were found to show relapse throughout the 320 days of observation. The sensitivity of the particular trypanosome strain to Cymelarsan was also supported by the relative improvement in the mean PCV levels of horses following treatment. A statistically significant difference (p<0.01) in the mean PCV levels of horses treated with Cymelarsan was observed between day 20 at peak parasitemia and days 40 as well as 60 of observation. The mean PCV levels of horses in the control group progressively decreased within the first 60 days of post infection. Two of the horses in the control group developed chronic form of dourine manifested by genital as well as nervous signs with progressive loss of body condition within 320 days post infection. The efficacy of Cymelarsan against the chronic form of dourine was confirmed after treatment of one of the control horses with Cymelarsan at a dose rate of 0.25 mg/kg body weight at day 282 post infection. It was noted that the treated horse improved overall body condition and clinical signs such as incoordination of hind legs, weakness and ventral oedema disappeared within 10 days of treatment. Thus, Cymelarsan was found to be quite effective in curing horses in acute as well as chronic form of dourine. The results obtained from the present study will be important for designing effective control measures against dourine.