Comparison between active and passive surveillance within the network of epidemiological surveillance of animal diseases in Chad

Acta Tropica
Mahamat OuagalDirk Berkvens

Abstract

A comparative study between passive and active surveillance based on herd visits (villages) was conducted over a period of 24 months. It included 106 surveillance stations of the animal disease epidemiological surveillance network in Chad distributed randomly into 52 stations of active surveillance and 54 stations of passive surveillance. Nine diseases of various vaccination and expected prevalence status were monitored. The active surveillance stations carried out four herd visits monthly to look for the diseases under surveillance and organised four farmers awareness-raising meetings to stimulate them to make disease notifications. The passive surveillance stations held each month four farmer awareness-raising meetings. The suspicions recorded by the stations were consigned to a suspicion form specific to each disease, indicating whether a call from the farmer, a visit to the herd or a awareness-raising meeting was the source. The results showed that, irrespective of surveillance type, all diseases under surveillance, except the rare diseases (Rinderpest and Rift Valley Fever) were reported by the surveillance agents. However, suspicions recorded following farmer calls are significantly more important than suspicions carried ...Continue Reading

References

Mar 10, 2004·Revue Scientifique Et Technique·J C MarinerP L Roeder

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Citations

Aug 3, 2013·Preventive Veterinary Medicine·L J HoinvilleK D C Stärk
Aug 16, 2012·Epidemiology and Infection·E V TaylorR V Tauxe
Jul 4, 2019·Revista Do Instituto De Medicina Tropical De São Paulo·Marlen Martinez-GutierrezJulian Ruiz-Saenz
Dec 18, 2019·Veterinary Medicine and Science·Arada Izzedine Abdel-AzizLabib Bakkali Kassimi

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