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    PCR investigation of Panton-Valentine leukocidin, enterotoxin, exfoliative toxin, and agr genes in Staphylococcus aureus strains isolated from psoriasis patients
    (Tubitak Scientific & Technical Research Council Turkey, 2015) Gocmen, Julide Sedef; Sahiner, Neriman; Kocak, Mukadder; Karahan, Zeynep Ceren
    Background/aim: Staphylococcus aureus colonization is a determiner of disease activation in psoriasis patients. Here we evaluate the presence of genes encoding Panton-Valentine leukocidin (PVL), enterotoxins, TSST-1, exfoliative toxins, and the accessory gene regulatory locus by polymerase chain reaction (PCR) in S. aureus isolates obtained from healthy and diseased skin regions and anterior nares of psoriasis patients and healthy controls. Materials and methods: The presence of PVL and toxin genes was investigated, and agr typing was performed by PCR. Results: Eighteen of the isolated strains carried the sei, 1 carried the seb-sec, and 1 carried the seg enterotoxin gene. Eight of the strains carrying enterotoxin genes were isolated from nasal swabs, 6 from diseased skin swabs, and 4 from healthy skin swabs. None of the strains isolated from the control group carried the agr locus. On the other hand, 11 of the S. aureus strains isolated from the patients carried type 1, 7 carried type 1 + 3, 4 carried type 2, 4 carried type 3, and 1 carried type 1 + 2 agr loci. Conclusion: Enterotoxin production and the carried accessory gene regulatory locus may be important in the aggravation of psoriasis.
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    The Prevalence of Enterotoxigenic E. Coli Isolated from the Stools of Children Aged 0-10 Years with Diarrhea in Mid-Anatolia Region, Turkey
    (Springer, 2011) Iseri, Latife; Apan, Teoman Zafer; Aksoy, Altan; Koc, Figen; Gocmen, Julide Sedef; Nuristani, Diba
    The stool samples from 245 patients with diarrhea were tested for heat labile toxin (LT) and heat stable toxins (ST) by passive latex agglutination and enzyme immunoassay methods respectively. Twelve (4.9%) enterotoxigenic E. Coli ETEC strains were isolated. Five strains (2%) expressed ST, and 7 (2.8%) expressed LT.