Qualidade das águas de bebedouros pendulares em granjas avícolas

Abstract

It is known that animals needs relating to water consumption varies occording to species, type of creation, housing, environmental conditions, and temperature. In the poultry farms involved in the research, one in Cruz das Almas, Bahia and another in Governador Mangabeira also Bahia, it was evaluated the contamination of the water which supplied the bell drinkers offered for the chickens. Water samples were collected from the sheds at different stages of the birds growth in order to quantify the amount of microorganisms and assess contamination in relation to the age of the animals. The birds growth was ccompanied weekly during the 42 days of each lot. We evaluated the microbiological water quality of two lots from a farm and one from the other farm; from each batch was analyzed samples of water from 10 drinkers weekly. It was also evaluated the water from the main reservoir of each farm. The samples were submitted to the measurement of total coliforms, Escherichia coli, faecal streptococci and mesophilic microrganism. For this it was used the membrane filter technique, which allows counting all bacteria in 1 ml volumes of water. The ECC HiCrome selective agar was used for the simultaneous detection of coliforms and Escherichia coli, the Enterococcus sp detection technique used was the chromogenic substrate via Enterolert. Mesophilic counts was done using the technique of "Pour Plate", using as a culture medium of Plate Count Agar. Of the 180 samples analyzed was observed that bacterial growth in the water bell drinkers showed heavy contamination, with higher growth in the fourth and fifth week. On the exposed, it was observed that the water in the bell drinkers was outside the standards required by legislation.