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Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil

BACKGROUND: Hair sheep breeds are a new, cost-effective option for the diversification of livestock in the Midwest region of Brazil. They are grazed extensively with cattle as well as in isolation in small areas. Hair sheep breeds are vulnerable to infestation by parasites such as the cattle tick, R...

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Autores principales: Garcia, Marcos Valério, Andreotti, Renato, Reis, Fernando Alvarenga, Aguirre, André de Abreu Rangel, Barros, Jacqueline Cavalcante, Matias, Jaqueline, Koller, Wilson Werner
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4243285/
https://www.ncbi.nlm.nih.gov/pubmed/25404176
http://dx.doi.org/10.1186/s13071-014-0515-5
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author Garcia, Marcos Valério
Andreotti, Renato
Reis, Fernando Alvarenga
Aguirre, André de Abreu Rangel
Barros, Jacqueline Cavalcante
Matias, Jaqueline
Koller, Wilson Werner
author_facet Garcia, Marcos Valério
Andreotti, Renato
Reis, Fernando Alvarenga
Aguirre, André de Abreu Rangel
Barros, Jacqueline Cavalcante
Matias, Jaqueline
Koller, Wilson Werner
author_sort Garcia, Marcos Valério
collection PubMed
description BACKGROUND: Hair sheep breeds are a new, cost-effective option for the diversification of livestock in the Midwest region of Brazil. They are grazed extensively with cattle as well as in isolation in small areas. Hair sheep breeds are vulnerable to infestation by parasites such as the cattle tick, Rhipicephalus microplus, which causes various types of damage and can transmit diseases. METHODS: In this study, Santa Inês hair sheep were naturally infested in an area contaminated by infested cattle and then monitored to determine the ability of these animals to maintain the local tick population in the absence of cattle. After engorged tick females of each generation fell off, the animals were placed in another pasture and were returned only after larvae reappeared in the original pasture. RESULTS: Tick counts were performed every ten days for three generations of sheep, and average infestations per animal of 34, 12 and 4 ticks were observed for each successive generation. These numbers suggest the acquisition of resistance; however, additional studies are needed to ensure resistance is achieved. The average length of the parasitic phase for each generation of ticks was 25 days. CONCLUSION: We concluded that this hair sheep breed, even if kept separate from cattle, is able to maintain tick populations for at least three generations, although a gradual decrease in the population levels of R. microplus over three generations was observed. We also detected two positive cases of Anaplasma spp. Therefore, it appears that the Santa Inês hair sheep breed contributes to the circulation of this bacterium among other ruminants.
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spelling pubmed-42432852014-11-26 Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil Garcia, Marcos Valério Andreotti, Renato Reis, Fernando Alvarenga Aguirre, André de Abreu Rangel Barros, Jacqueline Cavalcante Matias, Jaqueline Koller, Wilson Werner Parasit Vectors Research BACKGROUND: Hair sheep breeds are a new, cost-effective option for the diversification of livestock in the Midwest region of Brazil. They are grazed extensively with cattle as well as in isolation in small areas. Hair sheep breeds are vulnerable to infestation by parasites such as the cattle tick, Rhipicephalus microplus, which causes various types of damage and can transmit diseases. METHODS: In this study, Santa Inês hair sheep were naturally infested in an area contaminated by infested cattle and then monitored to determine the ability of these animals to maintain the local tick population in the absence of cattle. After engorged tick females of each generation fell off, the animals were placed in another pasture and were returned only after larvae reappeared in the original pasture. RESULTS: Tick counts were performed every ten days for three generations of sheep, and average infestations per animal of 34, 12 and 4 ticks were observed for each successive generation. These numbers suggest the acquisition of resistance; however, additional studies are needed to ensure resistance is achieved. The average length of the parasitic phase for each generation of ticks was 25 days. CONCLUSION: We concluded that this hair sheep breed, even if kept separate from cattle, is able to maintain tick populations for at least three generations, although a gradual decrease in the population levels of R. microplus over three generations was observed. We also detected two positive cases of Anaplasma spp. Therefore, it appears that the Santa Inês hair sheep breed contributes to the circulation of this bacterium among other ruminants. BioMed Central 2014-11-18 /pmc/articles/PMC4243285/ /pubmed/25404176 http://dx.doi.org/10.1186/s13071-014-0515-5 Text en © Garcia et al.; licensee BioMed Central Ltd. 2014 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Garcia, Marcos Valério
Andreotti, Renato
Reis, Fernando Alvarenga
Aguirre, André de Abreu Rangel
Barros, Jacqueline Cavalcante
Matias, Jaqueline
Koller, Wilson Werner
Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title_full Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title_fullStr Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title_full_unstemmed Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title_short Contributions of the hair sheep breed Santa Ines as a maintenance host for Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in Brazil
title_sort contributions of the hair sheep breed santa ines as a maintenance host for rhipicephalus (boophilus) microplus (acari: ixodidae) in brazil
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4243285/
https://www.ncbi.nlm.nih.gov/pubmed/25404176
http://dx.doi.org/10.1186/s13071-014-0515-5
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