The Seasonal Activity of Ixodes ricinus Tick in Amol, Mazandaran Province, Northern Iran.

Background: The present study aimed to demonstrate the seasonal activities of Ixodes ricinus at the pasture level and on the host.

Methods: A vast pasture in Amol countryside (Mazandaran Province, Iran) which had the potential for a considerable number of cattle and sheep to graze was chosen. Tick sampling from the skin of 130 cattle and 130 sheep were collected every month interval.

Could Helicobacter pylori play an important role in axonal type of Guillain-Barré syndrome pathogenesis?

In this case-control study, ELISA and Western blot with whole bacterial protein lysate were performed on serum and cerebrospinal fluid (CSF) of 15 controls and 15 patients. According to Griffin subtypes, 10 of our patients were in acute inflammatory demyelinating polyradiculoneuropathy (AIDP) group, 3 in acute motor axonal neuropathy (AMAN) group, and 2 in acute motor sensory axonal neuropathy (AMSAN) subtype. 86.

Effect of Zataria multiflora Boiss. essential oil on growth and aflatoxin formation by Aspergillus flavus in culture media and cheese.

The effect of Zataria multiflora Boiss. essential oil (EO) against growth, spore production and aflatoxin formation by Aspergillus flavus ATCC 15546 was investigated in synthetic media as well as Iranian ultra-filtered white cheese in brine. EO effectively inhibited radial growth and spore production on potato dextrose agar (PDA) in a dose-dependent manner.

Antibiotic-resistance patterns and frequency of extended-spectrum beta-lactamase-producing isolates of Klebsiella pneumoniae in Tehran.

Background: Extended-spectrum beta-lactamase (ESBL)-producing strains of Klebsiella pneumoniae have caused major therapeutic problems worldwide since the majority are resistant to various antibiotics. In this study, an investigation was conducted regarding antibiotic-resistant patterns of 128 isolates of K pneumonile cultured from Iranian patients at two teaching hospitals during 2004-2005.

Material/methods: The susceptibility of isolates to 21 antimicrobial agents was determined using the disk diffusion method.