background: metronidazole, a 5-nitroimidazole derivative, is the main antitrich­omonal agent of  choice   for   treatment  of t richomoniasis . since 1962, s ome cases of treatment failure with metronidazole have been reported and recently drug re­sistance is now on the rise in the world. this study was aimed to determine current susceptibility of iranian isolates of trichomonas vaginalis to me...

The prevalence of Toxoplasma gondii in free range chickens is a good indicator of the prevalence of T. gondii oocysts in the environment because chickens feed from the ground. In the present study, prevalence of T. gondii in 40 free range chickens (Gallus domesticus) from a rural area surrounding Paraná, Brazil was assessed. Blood, heart, and brain from each chicken were examined for T. gondii ...

Background and Purpose: Globally, dermatophytes are the most common filamentous group of fungi causing cutaneous mycoses. Dermatophytes were shown to secrete a multitude of enzymes that play a role in their pathogenesis. There is limited data on co-hemolytic (CAMP-like) effect of different bacterial species on dermatophyte species. In this study, we sought to the evaluate exoenzyme activity an...

Until recently, Toxoplasma gondii was considered to be clonal with very little genetic variability. Recent studies indicate that T. gondii isolates from Brazil are genetically and biologically different from T. gondii isolates from USA and Europe. However, little is known of the genetics of T. gondii strains from Africa. In this study, we genotyped 19 T. gondii isolates from chickens from six A...

Grapevine trunk diseases (GTDs) cause significant yield losses worldwide and limit the lifespan of vineyards. In last few years, using biological control agents (BCAs) for pruning wound protection has become a promising management strategy these pathologies. This study aimed to compare antifungal activities grapevine-native Trichoderma harzianum isolate high-potential Bacillus velezensis strain...

A real-time PCR genotypic assay was developed for the detection of isoniazid (INH) resistance in Mycobacterium tuberculosis. The assay detects mutations C(-15)T and, possibly, G(-24)T in the regulatory region of the inhA gene and proved as sensitive and specific as nucleotide sequencing in all the clinical isolates tested. Our assays mapped the mutations efficiently in 10 out of 35 resistant is...

A survey of cabbage looper, Trichoplusia ni, populations in greenhouse vegetable crops in the Fraser Valley (FV) of British Columbia, Canada led to the isolation of a large number of Nucleopolyhedrovirus (NPV) single-infected-larva isolates. These NPVs were identified from cadavers by phase-contrast light microscopy and characterized as either T. ni SNPV (TnSNPV) or Autographa californica MNPV ...

Twelve clarithromycin-resistant (MIC, > or = 1 microg/ml) Helicobacter pylori isolates were analyzed for point mutations in the 23S rRNA gene. Sequence analysis of all of the resistant isolates revealed a T-to-C transition mutation at position 2182. Transformation experiments confirmed that a single T-to-C transition mutation at position 2182 is associated with clarithromycin resistance.

We investigated the sequence and the genetic context of the erm(T) gene in six inducible erythromycin-resistant Streptococcus gallolyticus subsp. pasteurianus (formerly S. bovis biotype II.2) isolates. In all isolates, the erm(T) genes were flanked by two IS1216V-like elements with the same polarity and were found to be inserted in the chromosome.