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Vet Sci

Title:		Effects of Synthetic Acaricides and Nosema ceranae (Microsporidia: Nosematidae) on Molecules Associated with Chemical Communication and Recognition in Honey Bees
Author(s):		Porrini MP; Garrido PM; Umpierrez ML; Porrini LP; Cuniolo A; Davyt B; Gonzalez A; Eguaras MJ; Rossini C;
Address:		"Centro de Investigacion en Abejas Sociales (CIAS), Instituto de Investigaciones en Produccion Sanidad y Ambiente (IIPROSAM), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Funes 3350, Mar del Plata 7600, Argentina. Laboratorio de Ecologia Quimica, Facultad de Quimica, Universidad de la Republica Uruguay, Montevideo 11800, Uruguay"
Journal Title:		Vet Sci
Year:		2020
Volume:		20201208
Issue:		4
Page Number:		-
DOI:		10.3390/vetsci7040199
ISSN/ISBN:		2306-7381 (Electronic) 2306-7381 (Linking)
Abstract:		"Acaricides and the gut parasite Nosema ceranae are commonly present in most productive hives. Those stressors could be affecting key semiochemicals, which act as homeostasis regulators in Apis mellifera colonies, such as cuticular hydrocarbons (CHC) involved in social recognition and ethyl oleate (EO) which plays a role as primer pheromone in honey bees. Here we test the effect of amitraz, coumaphos, tau-fluvalinate and flumethrin, commonly applied to treat varroosis, on honey bee survival time, rate of food consumption, CHC profiles and EO production on N. ceranae-infected and non-infected honey bees. Different sublethal concentrations of amitraz, coumaphos, tau-fluvalinate and flumethrin were administered chronically in a syrup-based diet. After treatment, purified hole-body extracts were analyzed by gas chromatography coupled to mass spectrometry. While N. ceranae infection was also shown to decrease EO production affecting survival rates, acaricides showed no significant effect on this pheromone. As for the CHC, we found no changes in relation to the health status or consumption of acaricides. This absence of alteration in EO or CHC as response to acaricides ingestion or in combination with N. ceranae, suggests that worker honey bees exposed to those highly ubiquitous drugs are hardly differentiated by nest-mates. Having determined a synergic effect on mortality in worker bees exposed to coumaphos and Nosema infection but also, alterations in EO production as a response to N. ceranae infection it is an interesting clue to deeper understand the effects of parasite-host-pesticide interaction on colony functioning"
Keywords:		Apis mellifera acaricides hydrocarbon profiles nosemosis primer pheromone survival;
Notes:		"PubMed-not-MEDLINEPorrini, Martin Pablo Garrido, Paula Melisa Umpierrez, Maria Laura Porrini, Leonardo Pablo Cuniolo, Antonella Davyt, Belen Gonzalez, Andres Eguaras, Martin Javier Rossini, Carmen eng Financial Project PICT 394/2014 and PICT 2044/2016, MinCyT/Ministerio de Ciencia, Tecnologia e Innovacion Productiva/ (Grant MRC-C-2011-1-7)/Inter-American Development Bank; the Programa Regional MERCOSUR EDUCATIVO (Grant MRC-C-2011-1-7)/ ANII, Grant FSA-INNOVAGRO-1-2013-12956/Agencia Nacional de Investigacion e Innovacion (ANII, Grant FSA-INNOVAGRO-1-2013-12956) and the Comision Sectorial de Investigacion Cientifica (CSIC, Universidad de la Republica, Grant from CSIC-Grupos program)/ Switzerland 2020/12/12 Vet Sci. 2020 Dec 8; 7(4):199. doi: 10.3390/vetsci7040199"