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   effects of benzalkonium chloride on planktonic growth and biofilm formation by animal bacterial pathogens  
   
نویسنده ebrahimi azizollah ,hemati majid ,shabanpour ziba ,habibian dehkordi saeed ,bahadoran shahab ,lotfalian sharareh ,khoibani shahin
منبع jundishapur journal of microbiology - 2015 - دوره : 8 - شماره : 2 - صفحه:1 -5
چکیده    Background: resistance toward quaternary ammonium compounds (qacs) is widespread among a diverse range of microorganisms and is facilitated by several mechanisms such as biofilm formation. objectives: in this study, the effects of benzalkonium chloride on planktonic growth and biofilm formation by some field isolates of animal bacterial pathogens were investigated. materials and methods: forty clinical isolates of escherichia coli, salmonella serotypes, staphylococcus aureus and streptococcus agalactiae (10 isolates of each) were examined for effects of benzalkonium chloride on biofilm formation and planktonic growth using microtiter plates. for all the examined strains in the presence of benzalkonium chloride, biofilm development and planktonic growth were affected at the same concentrations of disinfectant. results: the means of strains growth increase after the minimal inhibitory concentration (mic) were significant in all the bacteria (except for e. coli in 1/32 and s. agalactiae in of 1/8 mic). biofilm formation increased with decrease of antiseptics concentration; a significant increase was found in all the samples. the most darkness related to s. aureus and the least to salmonella. conclusions: bacterial resistance against quaternary ammonium compounds is increasing which can increase the bacterial biofilm formation.
کلیدواژه biofilms; benzalkonium compounds; salmonella; staphylococcus; streptococcus
آدرس shahrekord university, school of veterinary sciences, department of pathobiology, iran, shahrekord university, school of veterinary sciences, iran, shahrekord university, school of veterinary sciences, iran, shahrekord university, school of veterinary sciences, department of pathobiology, iran, shahrekord university, school of veterinary sciences, department of pathobiology, iran, shahrekord university, school of veterinary sciences, department of pathobiology, iran, shahrekord university, school of veterinary sciences, iran
 
     
   
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