Invitro efficacy of several disinfectants against Salmonella enterica serovar Enteritidis and Escherichia coli strains from poultry

Eficácia de vários desinfetantes in vitro contra cepas de Salmonella entérica serovar Enteritidis e Escherichia coli aviária

ABSTRACT

The efficacy of 28 individual or blended disinfectants against avianSalmonella enterica serovar Enteritidis and Escherichia coli strains was determined. An in vitro test in the presence and absence of serum as source of organic material was conducted. Povidone-iodine (releasing 1% available iodine), 1% potassium permanganate, 70% ethanol, 2% chlorhexidine digluconate and three commercial formulations based on quaternary ammonium compounds + formaldehyde or cresol derivates were the most effective against all strains tested and reduced bacterial counts by more than 10⁶ times (6-log₁₀) regardless of the presence of organic matter. These commercial compounds as well as ethanol and chlorhexidine among the individual substances tested might be helpful in the adoption of environmental control measures against these two enterobacteria in poultry industry.

Key words:
Salmonella enterica serovar Enteritidis; Escherichia coli ; disinfection; suspension test; poultry industry