ANTAGONISTIC ACTIVITY OF ACETIC ACID BACTERIA AGAINST POTENTIAL PATHOGENIC GERMS ISOLATED FROM POULTRY LITTER IN COTE DIVOIRE

Poultry litter is an important element in poultry production, influencing animal welfare, environmental impact and production efficiency. However, bedding is a potential source of contamination by potentially pathogenic microorganisms causing diseases that are responsible of huge economic losses. The aim of this study is to use acetic bacteria of various origins to control pathogens isolated from farm litter in the District of Abidjan. A total of 16 strains of acetic acid bacteria were used. Acidification capacity and antimicrobial activity of these strains were determined by different methods. Results showed that all 16 strains (T9I10, T9N3, T10I4, T11G3, T9N5, T11G6, T9G6, T7N8, T11G6, T0N5, T3G3, T3N7, T6D121, T2N5, T3G10 and T4G7) were capable of producing acetic acid with titratable acidity percentages ranging from 0.200±0.00 to 1.010±0.07%. These strains had strong antimicrobial activity, with inhibition diameters ranging from 15.800±1.21 to 23.533±1.15 mm for Escherichia coli, 13.667±3.05 to 28.667±1.15 mm for Salmonella spp, and 77.137 ± 1.82 to 91.037 ± 4.24 mm for Aspergillus spp. Therefore, these strains can be used for litter treatment in poultry farming and could be applied in other industrial fields and furthermore evaluated as potential probiotics.