DISTRIBUIÇÃO ESPACIAL FÚNGICA EM GALPÃO AVÍCOLA DE POSTURA EM DIFERENTES ÉPOCAS DO ANO NA REGIÃO DO VALE DO SUBMÉDIO SÃO FRANCISCO BRASIL.

Poultry sheds are places of intense multiplication of microorganisms that can cause contamination and infections to birds and workers. In this context, the objective of this work was: 1) to identify and quantify the main genera of fungi present in the aerial environment of a laying shed; and 2) evaluate the spatial distribution and correlations of these fungi with the climatic conditions inside the shed using the geostatistics tool in two seasons of the year (winter and summer). The study was carried out in partnership with a commercial farm located in the municipality of Casa Nova - BA. Data were collected following a sampling mesh with 4 columns and 15 lines, totaling 60 points. The fungal evaluation was through the collection of microorganisms in Petri dishes with Potato Dextrose Agar culture medium, which remained exposed to air for 15 minutes. Subsequently, the plates were taken to the laboratory and incubated in a growth chamber. After 72 hours, slides were mounted for identification and quantification of fungi. For each sampling point, the climatic variables: temperature, relative humidity and air velocity were recorded. It was found that the fungi present in the shed were: Cladosporium (34,8%), Aspergillus (30,8%), Penicillium (19,1%), Mucor (7,9%), Fusarium (7,5%) in summer and Fusarium (52,7%), Penicillium (39,1%), Cladosporium (6,9%), Aspergillus (0,8%), Mucor (0.4%) in winter. There was a higher incidence of colony-forming units of some genera in the winter period. With the use of geostatistics it was possible to identify the spatial correlation between climatic variables (temperature, relative humidity and air velocity) with fungal genera (Cladosporium sp., Mucor sp. and Fusarium sp.). The genera Aspergillus sp. and Penicillium sp. showed no spatial correlation with the climatic variables studied in the two analyzed periods. However, the generated maps made it possible to visually identify the points of greatest contamination by these fungi within the installation. [ABSTRACT FROM AUTHOR]