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Maryam Fazeli 2 Articles
Genetic Variability of Methicillin Resistant Staphylococcus Aureus Strains Isolated from Burns Patients
Mehdi Goudarzi, Nobumichi Kobayashi, Ali Hashemi, Maryam Fazeli, Masoumeh Navidinia
Osong Public Health Res Perspect. 2019;10(3):170-176.   Published online June 30, 2019
DOI: https://doi.org/10.24171/j.phrp.2019.10.3.08
  • 2,954 View
  • 111 Download
  • 8 Citations
AbstractAbstract PDF
Objectives

Staphylococcus aureus is a nosocomial pathogen that provides a major challenge in the healthcare environment, especially in burns units where patients are particularly susceptible to infections. In this study, we sought to determine molecular types of S. aureus isolates collected from burns patients, based on staphylococcal protein A and coagulase gene polymorphisms.

Methods

Antibiotic susceptibility testing of 89 S. aureus strains isolated from burn wounds of patients was assessed using the Kirby-Bauer disk diffusion method. Strains were characterized by spa typing, coa typing, and resistance and toxin gene profiling.

Results

A total of 12 different spa types were identified with the majority being t790 (18%). Panton-Valentine leucocidin encoding genes were identified in spa types t044 (5.6%), t852 (2.2%) and t008 (2.2%). The most commonly detected antibiotic resistance gene was ant (4′)-Ia (60.7%). Ten different coa types were detected and the majority of the tested isolates belonged to coa III (47.2%). All the high-level mupirocin-resistant and low-level mupirocin resistant strains belonged to coa type III.

Conclusion

The present study illustrated that despite the high frequency of coa III and spa t790 types, the genetic background of S. aureus strains in Iranian burns patients was diverse. The findings obtained are valuable in creating awareness of S. aureus infections within burns units.

Natural Infection with Rabies Virus: A Histopathological and Immunohistochemical Study of Human Brains
Firouzeh Farahtaj, Leila Alizadeh, Alireza Gholami, Alireza Tahamtan, Sadegh Shirian, Maryam Fazeli, Amir Sasan Mozaffari Nejad, Ali Gorji, Hamid Mahmoudzadeh Niknam, Amir Ghaemi
Osong Public Health Res Perspect. 2019;10(1):6-11.   Published online February 28, 2019
DOI: https://doi.org/10.24171/j.phrp.2019.10.1.03
  • 3,402 View
  • 204 Download
  • 10 Citations
AbstractAbstract PDF
Objectives

Despite all the efforts and increased knowledge of rabies, the exact mechanisms of infection and mortality from the rabies virus are not well understood. To understand the mechanisms underlying the pathogenicity of rabies virus infection, it is crucial to study the tissue that the rabies virus naturally infects in humans.

Methods

Cerebellum brain tissue from 9 human post mortem cases from Iran, who had been infected with rabies virus, were examined histopathologically and immunohistochemically to evaluate the innate immune responses against the rabies virus.

Results

Histopathological examination revealed inflammation of the infected cerebellum and immunohistochemical analyses showed an increased immunoreactivity of heat shock protein 70, interleukin-6, interleukin-1, tumor necrosis factor-alpha, caspase-3, caspase-9, toll-like receptor3 and toll-like receptor4 in the infected brain tissue.

Conclusion

These results indicated the involvement of innate immunity in rabies infected human brain tissue, which may aggravate the progression of this deadly disease.


PHRP : Osong Public Health and Research Perspectives