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Original Article

AJVS. 2018; 56(1): 110-116

In Vitro Synergistic and/or Antagonistic Studies of Norfloxacin with Some Disinfectants Against Salmonella Enteritidis

Rasha Mansour, Madiha S. Ibrahim, Hazem M. Shaheen.


Salmonella enterica serovar enteriditis is a food borne pathogen of human causing food-poisoning and sometime deaths. Many methods have been carried out to decrease the population and prevalence of the causative agent, including chemotherapy and disinfection. In this study, in vitro combination between chemotherapy and disinfection was carried out. Three disinfectants [TH4®(combination of quaternary ammonium compound and gluteraldhyde), Povidone Iodine®(iodophore) and Virkon® S(peroxygen compound)] were tested in vitro against Salmonella enteritidis. The effect of disinfectants, concentration and time of exposure on the survival of Salmonella enteritidis was investigated.TH4 0.5%(w/v),Virkon S 1%(w/v) and Povidone iodine7.5%(w/v) reduced Salmonella enteritidis by 99.9%,72% and 87%, respectively. Further, as the disinfectants' concentration decreased, the survival of bacteria increased. Virkon S and Povidone Iodine recorded satisfied result at 10 min exposure time. TH4 recorded high results at 30 min exposure time. The in vitro combination between the three disinfectants and 10%Norfloxacin showed improvement of the inhibitory effect of TH4and Povidone Iodine, while the inhibitory effect of Virkon S decreased. In addition, formation of macroscopically white precipitation, which interfere with effect of the two (Virkon Sand norfloxacin 10%) and lead to bad inhibitory effect on Salmonella enteritidis.

Key words: Salmonella enteritidis, Disinfectants, TH4,Virkon-S,Povidone Iodine, Norfloxacin.

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