Prevalence of SHV gene and antibiotic resistance of extended-spectrum β-lactamase-producing Escherichia coli strains isolated from abattoir wastewater in Mazandaran Province, north of Iran

Contamination with these bacterial isolates can be associated with different problems such as diarrhea, typhoid and dysentery (Picozzi SCM et al. 2014). [...]there is a need to consider the prevalence of bacterial isolates in abattoir wastewater from each geographical region. [...]the incidence of ESBL-producing isolates varies from a geographical locality to another. Since these isolates can be transferred into the human water and nutritional sources, it is essential to consider and control the spread of these isolates in each area. Currently, there is a little information about the ESBL-producing E. coli isolates from abattoir wastewater samples in Mazandaran Province, north of Iran. [...]a molecular characterization experiment was performed on wastewater samples of ESBL-producing E. coli collecting from 32 abattoirs in this province. [...]the number of total coliforms was calculated by counting the number of tubes giving positive reaction and comparing the pattern of positive results with standard statistical tables (Highsmith AK & Abshire RL 1975).