Flutuação de Diptera em granja avícola, Pelotas, Rio Grande do Sul, Brasil

Araujo

et al. 2018

Acta Scientiae. Vet.

Background: Health aspects of flocks of laying chickens, such as the occurrence of infestations by parasites and poultry pests, influence significantly the productivity indicators. In recent years, Brazilian poultry has gone through a scientific and technological evolution which resulted in high density poultry hens in the laying sheds and an increase of the occurrence of ectoparasites such as Diptera. The presence of these flies have caused negative impacts for poultry farming, since these may be responsible for the increase of stress and disease emergence and, in addition, reduction of productivity. In this context, the control of synanthropic Diptera is one of the challenges of the poultry farmers and professionals of this area. This study was carried to assess and characterize the risks for the presence of flies in chicken houses of laying farms in the state of Minas Gerais. Materials, Methods & Results:Was used a secondary database and adapted for this study, with information from 402 chicken houses of 42 laying hens commercial properties. The variables used to compose the correspondence model were selected through chi-square tests (P ≤ 0.05). A risk index was built to the presence of flies from variables considered as risk factors for these ectoparasites. In addition, a study of the spatial analysis was carried to evaluate the intensity of chicken houses of poultry farms with the presence of flies. For this, a Kernel map was produced using the QGIZ 2.18.1 software, georreferencing the regions of state of Minas Gerais that have these ectoparasites. It was observed the presence of flies in 253 chicken houses evaluated, which corresponds to a frequency of 62.9%, with the most present flies were Chrysomya spp. 37.3%, M. domestica 34.3%, Fannia spp. 16% and Stomoxys spp. 14%. The graph of the correspondence analysis produced for the epidemiological characterization of the presence of flies presented an accumulated chi-square value of 56.05%. There was an association of the risk index with removal interval and the humidity of the manure and with the type of installation of chicken houses. Farms with chicken houses that create their birds on the ground present a lower risk for the presence of Diptera. In addition, when the removal of the manure is performed manually and is not done periodically, the presence of flies in the chicken houses is observed. It was verified that clusters located in the messoregion south/southwest of Minas Gerais and between the west and metropolitan mesoregion of Belo Horizonte with chicken houses that have the presence of flies. Discussion: The accumulation and permanence of manure can occur in less technical farms that have laying hens kept in confinement with high densities. In the case of Diptera, the greater the interval of removal of the manure below cages, the greater the risk for their presence, combined with the high densities of the birds that contribute to a faster accumulation of manure. The humidity of the manure is another important factor for the development of fl...

Section: Discussionunclassified

Section: Introductionunclassified

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Epidemiological Characterization and Risk Assessment Associated with the Presence of Diptera Order in Laying Poultry Farms

Araujo

et al. 2018

Acta Scientiae. Vet.

“…There are also reports of losses in poultry establishments due to the stress caused by the painful stings of S. calcitrans, especially in the months most favorable to infestation TEMPELIS, 1970). BICHO et al (2004) state that diptera populations in poultry flocks, above the level of economic damage, cause some problems due to the habits of defecating and regurgitating on the surfaces, leaving stains on the farm equipment.…”

Section: Impact On Poultry Systemsmentioning

confidence: 99%

Synanthropic diptera affecting layer poultry farms: a review

Rezende¹,

et al. 2019

Arq. Inst. Biol.

The poultry farm of posture is an economic activity of great relevance to Brazil. Health aspects of flocks of laying chickens, such as the occurrence of infestations by parasites and poultry pests, influence significantly the productivity indicators. In this context, the control of synanthropic diptera is one of the challenges of the poultry farmers and professionals of this area. In Brazil, the control of flies in poultry environments is based mainly on the use of pesticides, while other alternatives are less frequent. Among the flies’ species most regularly found in poultry farms are the Musca domestica, Chrysomya spp., Fannia spp., and others. This review aims at compiling the literature on the occurrence, impact on poultry systems, biology, epidemiology and control of the species of synanthropic flies considered important for the Brazilian poultry industry.

“…Many fly species associated with manure in egg-laying farms have been previously described (Axtell & Arends, 1990), because the accumulation of waste under the laying cages provides a favorable environment for the development of diptera of the Fannia genus. In Brazil, F. canicularis was detected in poultry farms in the municipality of Pelotas, state of Rio Grande do Sul (Bicho et al, 2004) and the species F. trimaculata and F. pusio were described in municipalities of the state of São Paulo (Bruno et al, 1993). In the state of Minas Gerais, Lomônaco & Prado (1994) captured some diptera species, including F. trimaculata and F. pusio, in a layer farm of the municipality of Uberlândia.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and Epidemiology of Fannia Spp. (Diptera: Fanniidae) in Laying Poultry Farms in State of Minas Gerais, Brazil

Rezende

et al. 2018

Braz. J. Poult. Sci.

Aspects related to epidemiology of flies belonging to Fannia genus were studied in order to determine predisposing factors for its occurrence in layer hens houses of commercial farms in the state of Minas Gerais, Brazil. An observational, analytical and sectional survey was conducted to verify major epidemiological aspects associated to infestations. This research was accomplished starting from an adapted secondary database of and structured with information on the presence and absence of ectoparasites and arthropods, characteristics of chicken houses, the poultry, type of facilities, geographical location and the management. The study was conducted in four hundred and thirty one houses located in forty three farms visited in 2012 year in the state of Minas Gerais. Ten farms (23.25%) and sixty eight houses (15,77%) were observed the presence diptera belonging to Fannia genus. The specie Fannia admirabilis was found in four farms (9,30%), Fannia albitarsis in two farms (4,65%) and only in one farm (2.32%) was observed the presence of Fannia canicularis. For three farms 6,98% was no possible to identify the species only Fannia genus. The epidemiological aspects for the occurrence of these flies were investigated using Poisson regression models. Characteristics such as farm, city of farm, presence of Histeridae beetles, type of facility (cage, on the floor with or without bedding) and the existence of mechanical removal of manure were associated with the occurrence of Fannia spp.