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THE MASS USE OF DELTAMETHRIN COLLARS TO CONTROL AND PREVENT CANINE VISCERAL LEISHMANIASIS: A FIELD EFFECTIVENESS STUDY IN A HIGHLY ENDEMIC AREA
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Abstract
Visceral leishmaniasis (VL) is a zoonosis of great importance. Limitations in current VL control measures compromise efficacy, indicating the need to implement new strategies. The aim of this study was to evaluate the effectiveness of the mass use of deltamethrin-impregnated collars in dogs as a public health measure to control and prevent canine visceral leishmaniasis (CVL). Methodology
An interventional study was implemented in two endemic areas in the district of Monte
Gordo (Bahia-Brazil): an intervention area, in which VL seronegative dogs were collared,
and a control area in which only conventional CVL control measures were applied. At baseline,
seropositive dogs were removed and seronegative dogs were included. Dogs were
then reevaluated every 7±8 months for almost two years. At each time point, dogs in the
intervention area that remained seronegative received new collars and newly identified
seronegative dogs were included and collared. The local zoonosis control authorities were
notified of any dogs that tested seropositive in both areas, which were subsequently marked
for euthanasia as mandated by the Brazilian Ministry of Health.
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