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Introduction & Objective: Listeria monocytogenes is considered as a ubiquitous foodborne pathogen which can lead to serious infections, especially in newborns, elderly, pregnant, and immunocompromised people. The organism has been isolated from many foods and may cause meningitis, septicemia and abortion in pregnant women. Also L. monocytogenes forms biofilms on many food contact surface materials and medical devices. Development of biofilms on many surfaces is a potential source of contamination of foods that may lead to spoilage or transmission of foodborne pathogens. Materials & Methods: Biofilm formation of L. monocytogenes (RITCC 1293 serotype 4a) was investigated. Hydrophobicity of L. monocytogenes was measured by MATH method. Then biofilm formation of the organism was assessed at 2, 4, 8, 16 and 20 hours on stainless steel (type 304 no 2B), polyethylene and glass by drop plate method. Results: Results indicated that L. monocytogenes with 85% of hydrophobicity formed biofilm on each of three surfaces. Biofilm formation on stainless steel surfaces was significantly more than other surfaces (p<0.05). Conclusion: The ability of biofilm formation of L. monocytogenes on medical devices and food containers is very important as far as hygiene and disease outbreaks are concerned.

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Introduction & Objective: Dorema aucheri is from the piaceae family that exists in margins of Zagros mountains in Iran. In this study, the effect of 200 and 400 mg doses of Dorema aucheri extract on DMBA induced breast tumors in rats was investigated. Materials & Methods: This experimental study, was conducted in Herbal Medicine Research Center of Yasuj University of Medical Sciences. Forty rats were allocated in experimental and control groups. In experimental groups, after receiving DMBA, Dorema aucheri alcoholic extract in doses of 200 and 400 mg/kg of body weight were used orally for 12 weeks. One group of control animals received DMBA only and the other group received 200 mg of Dorema aucheri extract. At the end of 12 weeks, the tumor mass was isolated and evaluated by hematoxylin eosin histology staining. The average tumor size, number of tumors, and histology of tumors in groups were compared. The gathered data were analyzed using SPSS version 18, using ANOVA and Paired T test. Results: Mean of tumor number were significantly different in experimental and control groups. No tumor was seen in control group which received 200 mg of the extract while breast tumor was seen in other groups. Mean of tumor number in animals which received 400 mg of extract was significantly higher that the other groups (p<0.05). Conclusion: It seems that the dose of 400 mg extract of Dorema aucheri increases the tumor size, causes weight loss, decreases longevity and durability of rats while dose of 200 mg of extract reduces the tumor growth and tumor necrosis in Sprague Dawley female rat’s with breast tumor induced by DMBA

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Abstract
Background and aim: The uterus as the major female reproductive organ is particularly vulnerable to environmental and hormonal like compounds. Exposure to estrogen like disrupting chemicals during critical periods of development especially in the neonatal period can have adverse effects on reproduction and fertility later in life. In the present study, the effects of neonatal exposure of mycoestrogen zearalenone and anti-estrogen tamoxifen on some histological characteristics of the uterus in female mice were investigated.
Methods: 28 newborn female mice of BALB/c strain were divided into four groups of 7, three experimental and one control group. Treatment Groups included Tamoxifen (400 μg /kg /day) group, group treated with zearalenone (2 mg /kg /day) and group treated with tamoxifen                            + zearalenone. Control mice received no treatment. Daily treatments was started first day of life and continued up to 5 subcutaneously. Approximately, 70 days after birth in diestrous stage of estrous cycle, mice were deeply anesthetized and uterus was removed. Following histochemical staining, the samples were studied using light and transmission electron microcopies.
Results: The result of this study indicated that among the treatment groups, body weight decreased significantly (P>0.05) in the group which received Tamoxifen compared with control group. Uterus weight increased significantly in Zearalenone group (P>0.05), Tamoxifen and Zearalenone group (P>0.01).  Endometrial thickness increased significantly (P>0.05) in group which received Tamoxifen and decreased significantly (P>0.05) in group which received Zearalenone. In addition, myometrial thickness decreased significantly (P>0.05) in group which received Zearalenone compared with control group. The study of electron microscopy showed that the number of cells of uterine luminal epithelial structure increased in the group treated with Tamoxifen compared with control group.
Conclusion: The result of study indicated that neonatal administration of Tamoxifen and Zearalenone compounds cause histological lesions in uterus structure. Because of the estrogenic nature of zearalenone, the treated neonatal mice with this mycotoxin cause structural abnormalities especially in myometrial structure. On the other hand, Tamoxifen as an estrogenic agonist cause endometrial thickness increase and alterations in the uterus.
 

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Background & aim: Drug treatment, laser and surgery are among the treatments for reducing ocular pressure in glaucoma patients. Although laser is a safe treatment, some parameters may be affected. Therefore, the aim of the present study was to determine and evaluate laser trabeculoplasty in patients with primary wide-angle glaucoma and ocular hypertension.
 

Methods: In this prospective descriptive study that was performed in Farshchian Hospital in Hamadan in 2017-2018, 56 patients with primary open-angle glaucoma and hypertension diagnosed for the first time or did not have uncontrolled eye pressure despite receiving medical treatment, underwent Laser treatment of selective trabeculoplasty were selected. Intraocular pressure, anterior segment parameters and macular thickness were measured in the 5 upper, lower, foie, nasal and temporal regions before the laser and at intervals of 1, 3 and 6 months after the laser and were compared between the two groups. The collected data were analyzed using Chi-square and t-test. 

Results: Intraocular pressure decreased in both groups in the follow-ups(p<0.05). The macula increased slightly in the 1st and 3rd months after the laser, and except in the temporal region in the wide-angle glaucoma group, in the sixth month the macular thickness reached baseline in all areas and in both groups. The central corneal thickness, despite a slight increase in the first month, had a downward trend in other follow-ups, the changes of which were significant in the ocular hypertension group (p<0.05). The volume and depth of the anterior chamber also decreased significantly in both groups (p<0.05).
 
Conclusion: Although trabeculoplasty laser is a good and safe treatment, it can make slight changes in the parameters of the anterior segment and macula.

 

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Background & aim: Considering that overweight and obesity in transplant patients are considered as a risk factor for the occurrence of metabolic disorders, heart diseases and reduced kidney function, therefore, the purpose of the present study was to determine and investigate the relationship between anthropometric indicators and kidney function. In addition, the serum levels of fibroblast growth factor-23 and matrix gamma carboxyglutamate protein were markers of cardiovascular disease risk in kidney transplant patients.

Methods: The present study was conducted as a cross-sectional study in 2016-2019. Ninety kidney transplant patients referred to Tabriz Imam Reza (AS) hospital clinic, between 18 and 70 years of age and had normal kidney function and were within 6-12 months after transplant, were selected. Weight, height, waist circumference, body mass index and ratio of waist circumference to height were measured. Serum levels of fibroblast growth factor-23 and dephosphorylated and non-carboxylated protein matrix gamma carboxyglutamate were measured and glomerular filtration rate was calculated as an index of kidney function. Collected data were analyzed using Kolmogorov-Smirnov, Pearson and Spearman statistical tests.

Results: The mean and standard deviation of the age of the subjects was 44.10±13.05 years and 59% of the patients were male. Mean ± standard deviation of weight, body mass index, waist circumference and ratio of waist circumference to height of the patients were 69.61±11.59 kg, 25.77±4.42 kg/m2, 94.07±15.48 cm and respectively. It was 0.58±0.11. The prevalence of overweight and obesity based on body mass index was 38% and 17%, respectively. The mean ± standard deviation of the glomerular filtration rate is 57.45±12.61 ml/min per 1.73 square meter and the serum level of fibroblast growth factor-23 is 73.63±20.9 units/ml and the median (25th percentile) and the 75th percentile) the dephosphorylated and non-carboxylated protein gamma carboxy glutamate matrix of serum was also (1.3, 60.20) 2.40 micrograms/liter. Significant correlation between anthropometric indices with glomerular filtration rate and serum levels of fibroblast growth factor-23 and matrix gamma carboxy glutamate dephosphorylated and non-carboxylated protein, as well as between glomerular filtration rate and serum levels of fibroblast growth factor-23 and matrix gamma carboxy glutamate dephosphorylated protein and Non-carboxylated was not observed (p>0.05). A significant inverse correlation was observed between serum levels of fibroblast growth factor-23 and dephosphorylated and non-carboxylated protein gamma-carboxyglutamate matrix (p=0.036).

Conclusion: Considering that in the present study, the average weight, body mass index and also the performance of all patients were almost within the normal range, therefore, there is a significant relationship between anthropometric indices with glomerular filtration rate and serum levels of fibroblast growth factor-23 and gamma carboxy matrix. Dephosphorylated and non-carboxylated protein glutamate was not observed.

 

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Background & aim:  The use of broad-spectrum cephalosporins in the treatment of infections has led to the emergence of a new class of beta-lactamases called metallobetalactamase, these enzymes belong to Ambler's class B beta-lactamases. Group A and B metallobetalactamases in Enterobacteriaceae cause problems in treatment. The present study was conducted with the aim of phenotypic investigation of Escherichia coli and Klebsiella pneumoniae metallobetalactamase producing strains, as well as molecular investigation of SPM, VIM, SIM, IMP and GIM genes.

Methods: The present descriptive-quantitative study was conducted on 185 patients hospitalized in the special care units of Milad Hospital in Tehran from March to May 2018-2019, and 45 strains of Escherichia coli and 62 strains of Klebsiella pneumoniae were selected. In order to check the antibiotic resistance of the strains, diffusion test in agar was used and also to check the phenotypic of the metallobetalactamase producing strains, the combined disc method was used. Molecular investigation of metallobetalactamase producing genes was done by PCR method. The collected data were analyzed using Fisher's test. 

Results: In the present study, the highest antibiotic resistance of Escherichia coli and Klebsiella pneumoniae strains was observed to cotrimoxazole and cefepime antibiotics, respectively. 14.5% of Klebsiella pneumoniae strains and 15.5% of Escherichia coli strains produced metallobetalactamase enzyme in the phenotypic method. Also, 88.9% of the studied Escherichia coli strains carried the SPM gene, 40% carried the VIM gene, 66.7% carried the SIM gene, and 15.6% carried the IMP gene. SPM, VIM, SIM, IMP and GIM genes were found to be 54.8, 41.9, 58.1, 3.2 and 8.1% in Klebsiella pneumoniae strains, respectively.

Conclusion: In the present study, there was a high percentage of genes producing metallobetalactamase enzyme in bacteria, while 14.5% of Klebsiella pneumoniae strains and 15.5% of Escherichia coli strains were producing metallobetalactamase enzyme in the phenotypic method. that genes producing enzymes exist in bacteria and are not expressed in high amounts. There waS also the possibility that these genes were expressed, but could not be checked with the usual phenotypic methods, so efforts should be made to find reliable, cheap and easy phenotypic methods for phenotypic examination.