title: Response of Different Antibiotic Resistant Group of Streptococcus pyogenes to Environmental Stresses.
abstract: Streptococcus species is considered as an important pathogen for human and animals. The antibiotic resistance mechanism in this species is continuously increased. On the other side, the tolerance of environmental stresses play an effective role in the severity of many streptococcal causative disease. In this study we assayed survey on the causative agents of pharyngitis and tonsillitis patients. The predominant causative strain was Streptococcus pyogenes with 93 % isolating ratio frequency. The other pathogenic species were S. agalactia 5.3 % and S. pneumonia 1.7 %. According to the antibiotic resistant test the S. pyogenes isolates were classified into six different groups. A selected strain from each antibiotic resistant group was tested for tolerance of a restrictive environmental factors. The variations of the environmental niches of isolates were in consistence with their antibiotic resistant variation.
authors.affiliation: Molecular Biology Department, Genetic Engineering and Biotechnology Research Institute, Minufiya University, Sadat City, 22857-79 Egypt.
authors.forename: Naser
authors.initials: N
authors.lastname: Abbas
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Ismail
authors.forename: Mohamed
authors.initials: M
authors.lastname: El-Shahat Ebeid
keywords: Antibiotic resistant; Environmental stresses; Streptococcus pyogenes