نتایج جستجو برای: bacteria

تعداد نتایج: 180289  

Journal: :آب و خاک 0
احمد فرخیان فیروزی مهدی همایی اروین کلومپ روی کستیل مرتضی ستاری

abstract microbial contaminants transport to groundwater is a serious environmental problem that can result in large outbreaks of waterborne diseases. some of bacteria can travel from vadose zone and cause contamination of groundwater resources. thus, an accurate prediction of transport and fate of pathogenic microorganisms in unsaturated soil is needed to protect groundwater resources. the mai...

Journal: :iranian journal of public health 0
sh.hakimi m.sigaroodi m.mohammadi b.ghorayshi s.mahajer

a total number of 259 gram negative bacteria (entero-bacteria) isolated during the years 1973-1974 was examined. these strains were isolated from sick children referred and or hospitalized in a children hospital in tehran. the strains consisted of ; 131e.coli, 52 salmonella, 40 klebsiella, 18 shigella, 13 proteus, 3 enterobacter and 2 citrobacter. sensitivity tests were performed according to t...

Journal: :applied biotechnology reports 0
jafar khezri national institute of genetic engineering and bio-technology iran, tehran fathollah ahmadpour applied biotechnology research center, baqiyatal-lah university of medical sciences, tehran, iran samira talebi national institute of genetic engineering and bio-technology iran, tehran

bacterial utilize a multitude of methods to secretion of specific substrate across phospholipid membranes. these bacterial strategies can play many roles in promoting bacterial process, from enhancing pathogenesis to bacterial response to environmental condition. the secretion in bacterial species transfer and release performance substance such as proteins, enzymes and metabolites to environmen...

Journal: :avicenna journal of clinical microbiology and infection 0
hossein kazemian clinical microbiology research center, ilam university of medical sciences, ilam, ir iran; department of medical microbiology, school of medicine, tehran university of medical sciences, tehran, ir iran aref shavalipour department of microbiology, school of medicine, shahid beheshti university of medical sciences, tehran, ir iran hamid heidari department of bacteriology and virology, school of medicine, shiraz university of medical sciences, shiraz, ir iran ali saeedi department of immunology, school of medicine, shahid beheshti university of medical sciences, tehran, ir iran sobhan ghafourian clinical microbiology research center, ilam university of medical sciences, ilam, ir iran reza mohebi clinical microbiology research center, ilam university of medical sciences, ilam, ir iran

conclusions the results showed that some patients were probably contaminated with nonbacterial and nonparasitic agents. all the parasitic isolates were resistant to most antibiotics. therefore determination of microbial isolates and antibiotic susceptibility is necessary before treatment procedures. results of 2376 patients, 466 (19.6%) were contaminated with pathogenic bacteria or protozoa.the...

Journal: :گوارش 0
iradj sobhani jeanne tranvannhieu

in western countries there is a growing incidence in obesity, inflammatory bowel disease (ibd) and colorectal cancer (crc), which places an increasingly important burden on the health care system. in the current decade, changes in intestinal microflora (i.e., dysbiosis) are likely the result of environment factors such as food, lifestyle, and medications which have been shown in obesity and ibd...

Journal: :iranian journal of veterinary research 2008
e. rowghani m. j. zamiri m. khorvash a. abdollahipanah

the chemical composition, in situ ruminal degradability coefficients of dry matter (dm), and nutrient digestibility in sheep were evaluated for corn silage (cs) treated (fresh weight basis) with different levels of a commercial bacterial inoculant (i) as follows: (1) untreated cs (control); (2) cs + i at half of the recommended level; (3) cs + i at the recommended level (3  1010 colony forming...

Journal: :journal of dentistry, tehran university of medical sciences 0
neda moslemi tehran university of medical sciences aysan shahnaz tehran university of medical sciences abbas bahador tehran university of medical sciences sepehr torabi tehran university of medical sciences sanaa jabbari shahid beheshti university of medical sciences zahra alizadeh oskouei

objectives: with side effects of antibiotics taken into consideration, the necessity of antibiotic therapy after simple implant placement procedures is still a subject of debate and the existing literature on this topic is widely controversial. the aim of this study was to assess the effect of postoperative amoxicillin therapy on early colonization of peri-implant sulcus after implant placement...

Journal: :iranian journal of public health 0
r ranjbar molecular biology research center, baqiyatallah university of medical sciences, tehran, iran mt haghi-ashtiani laboratory of microbiology, children's medical center, school of medicine, tehran university of medi n jonaidi jafari health research center, baqiyatallah university of medical sciences, tehran, iran m abedini laboratory of microbiology, children's medical center, school of medicine, tehran university of medi

background: urinary tract infection (uti) is considered as the most common bacterial infectious disease seen among the pediatric patients. the aim of this study was to investigate the prevalence and antimicrobial susceptibility of bacterial uropathogens isolated from the pediatric patients with urinary tract infections. methods: this descriptive study was conducted in children medial center, te...

Journal: :medical laboratory journal 0
shirin sheikholeslami pharmaceutical sciences branch, islamic azad university, tehran, iran seyed mahdi rezayat pharmaceutical sciences branch, islamic azad university, tehran, iran reza hosseini doust pharmaceutical sciences branch, islamic azad university, tehran, iran hamid reza ahmadi ashtiani islamic azad university, pharmaceutical sciences branch, tehran, iran

abstract       background and objective: the spread of drug resistance in bacteria have prompted researchers to seek suitable alternative for antimicrobial drugs among various medicinal plants and nanoparticles. the aim of this study was to evaluate the effect of silver nanoparticles alone and in combination with methanol extract of zataria multiflora on five gram-positive and gram-negative bac...

Journal: :iranian journal of public health 0
m.h. salari

acute infectious gastroenteritis is one of the most common infectious diseases of humans in the world. diarrhea is a significant cause of death in infants. it has been estimated that up to 15% of children in developing nations die of diarrhea before 3 years of age. this study has been carried out to investigate entheropathogenic bacteria from 558 specimens of children less than 5 years of age. ...

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