Resistogram typing of Salmonella serotypes of avian origin

Abstract

The resistogram typing of the 65 Salmonella isolates of poultry and its environment has shown 36 different patterns. Among the various dyes and chemicals used organisms evinced a high rate of resistance to the chemicals such as 0.7% copper sulphate (81.54%) and 0.003% malachite green (78.46%) followed by 0.09% acriflavine (69.23%) and 0.0006% phenyl mercuric nitrate (67.69%). The copper sulphate and malachite green have the least discriminating ability in the differentiation of strains in resistogram typing. Among the dyes and chemicals used only 3 out of 65 isolates have shown resistance to 0.7% 4-chloresorcinol.