ABSTRACT
The authors evaluate two quaternary ammonium compounds, first and second generation, using three methods: minimum bactericide concentration, the suspension test of the German Society for Hygiene and Microbiology and the agar gel diffusion test. The compounds were tested against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Enterococcus faecalis from sheep and pigs. The results show that quaternary ammonia compounds with dodecyl chains have greater efficacy than benzalconium chloride, and that quaternary ammonium compounds are more effective against gram-positive bacteria. No resistance linked to the strains used in the tests was detected. Finally, the authors demonstrate that all three techniques are valid for the evaluation of quaternary ammonium disinfectants.
Subject(s)
Disinfectants/standards , Disinfection/standards , Quaternary Ammonium Compounds/standards , Animals , Disinfectants/pharmacology , Drug Resistance, Bacterial , Enterococcus faecalis/drug effects , Escherichia coli/drug effects , Microbial Sensitivity Tests/veterinary , Pseudomonas aeruginosa/drug effects , Quaternary Ammonium Compounds/pharmacology , Sheep , Staphylococcus aureus/drug effects , SwineABSTRACT
An outbreak of dermatophytosis caused by Microsporum canis in a porcine farm is described. The morbidity was 100% among sows, 95% among new-borns and 75% among feedlot animals. Microsporum canis was also isolated from walls and environmental air.
