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Laboratory evidence that dinotefuran, pyriproxyfen and permethrin combination abrogates Leishmania infantum transmissibility by sick dogs
Author(s) -
Bongiorno G.,
Bosco A.,
Bianchi R.,
Rinaldi L.,
Foglia Manzillo V.,
Gizzarelli M.,
Maurelli M. P.,
Giaquinto D.,
El Houda Ben Fayala N.,
Varloud M.,
Crippa A.,
Oliva G.,
Gradoni L.,
Cringoli G.
Publication year - 2022
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1111/mve.12553
Subject(s) - biology , leishmania infantum , pyriproxyfen , psychodidae , leishmaniasis , permethrin , xenodiagnosis , transmissibility (structural dynamics) , veterinary medicine , blood meal , visceral leishmaniasis , phlebotominae , immunology , parasite hosting , medicine , pesticide , zoology , ecology , world wide web , computer science , trypanosoma cruzi , physics , vibration isolation , quantum mechanics , vibration
Abstract Dogs are reservoir hosts of leishmaniasis caused by Leishmania infantum and transmitted by phlebotomine vectors. The effect of dinotefuran, pyriproxyfen and permethrin spot‐on solution (Vectra®3D, Ceva Santé Animale, Libourne, France) on Leishmania transmissibility by naturally infected dogs via reared Phlebotomus perniciosus , was assessed. Dogs affected by leishmaniasis were submitted to xenodiagnosis and 6 infecting >10% of insects were treated topically on day 0. Antifeeding, insecticidal and anti‐transmissibility effects were evaluated through xenodiagnoses performed on days 1, 7 and 28, using individual pre‐treatment parameters as control. Feeding and mortality rates were assessed at 24 h, whereas promastigote infection, maturation and burden were assessed up to 96 h post blood meal (potentially infectious rate). On day 1, the anti‐feeding efficacy was >95% in 4 dogs, insecticidal efficacy 100% in 4 dogs, and anti‐transmissibility effect 100% in 6 dogs. Efficacy rates recorded on day 7 were very similar to day 1. On day 28, anti‐feeding and insecticidal efficacy values were much broader, ranging 32.6–100% and 7.7–94.4%, respectively. Potentially infectious insects were recorded from two dogs, with sharp decrease in transmissibility rate as compared with pre‐treatment condition. Altogether, Vectra®3D abrogated by >98% the potential Leishmania transmissibility by the examined pool of infected dogs over 1 month.