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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Health Sciences and Surveillance System
- نوع مقاله: Journal Article
- کلمات کلیدی: children,Women,Escherichia coli,Antibiotic Susceptibility,Nosocomial infections
- چکیده:
- چکیده انگلیسی: AbstractBackground: Escherichia coli, known as a clinically significantbacteria, can cause a wide range of infections, including urinarytract infections (UTIs), blood stream infections (BSIs), andcan frequently be isolated from various clinical specimens.Evaluation of antimicrobial resistant pattern is a necessaryaction, especially about such bacteria which are frequent andlife threatening. The aim of this study was to determine thefrequency and antimicrobial resistance pattern of E. coli isolatesobtained from various clinical specimens.Methods: This retrospective study was performed within a sevenmonth period from January 2015 to August 2015 at a specializedwomen and children hospital in Shiraz, Iran. E. coli isolates wereobtained from various clinical specimens and identified usingstandard microbiological procedure. Antimicrobial susceptibilitypatterns were determined using disk diffusion method inaccordance with CLSI recommendation.Results: Of the total 130 positive cultures, the majority of E.coli isolates were obtained from urine (96=73.8%) and blood(11=8.5%) specimens. Overall, gentamicin (70.8%) was theeffective antibiotic for the tested E. coli isolates. E. coli isolatesobtained from urine specimens showed the highest resistancerates against ampicillin (84.4%) and nalidixic acid (61.5%);while they showed the most sensitivity to gentamicin (79.2%),nitrofurantoin (70.8%) and ciprofloxacin (66.7%). Moreover,the highest antibiotic resistance rates belonged to the isolatesrecovered from endotracheal tube (ETT).Conclusion: The results showed that gentamicin was the mosteffective antibiotic against E. coli infections. However, inaddition to the gentamicin, we can recommend nitrofurantoinand ciprofloxacin as the other effective agents for UTIs.
- انتشار مقاله: 06-08-1395
- نویسندگان: Mahtab Hadadi,Yalda Malekzadegan,Hamid Heidari,Hadi Sedigh Ebrahim-Saraie,Mohammad Motamedifar
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Statement of the Problem: The rate of antibiotic resistance in bacteria and side effects of antibiotics and oral and teeth health care products are increasing. Therefore, researchers aim at finding new alternatives to control bacteria of dental caries.Purpose: The objective of this study was to investigate the inhibitory and bactericidal effects of different concentrations of zinc sulfate and zinc acetate solutions on the main recognized agent of dental caries, Streptococcus mutans.Materials and Method: In this experimental study, different concentrations of aqueous zinc sulfate and zinc acetate solutions were prepared and the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of these salts for Streptococcus mutans were determined in compare with penicillin, chlorhexidine by micro-serial dilution method. In addition, the diameters of zone of inhibition for these salt solutions in four concentrations along with chlorhexidine, as the control, were detected by the disc diffusion method.Results: MIC and MBC of zinc sulfate solution were higher than penicillin and chlorhexidine. There were not statistically significant differences between the MIC and MBC of zinc acetate solution, penicillin, and chlorhexidine. In 25 and 50 µg/mL concentrations, the diameters of inhibition zone for zinc sulfate were more than zinc acConclusion: Zinc sulfate and zinc acetate salts with 37.19 and 31.25 µgr/mL concentration had inhibitory effect on Streptococcus mutans growth respectively, although, no priority in antibacterial activity of the studied zinc salts was determined in comparison with penicillin and chlorhexidine.Key Words Zinc sulfate; Zinc acetate; Streptococcus mutans
- انتشار مقاله: 09-11-1395
- نویسندگان: Fatemeh Lavaee,Janann Ghapanchi,Mohammad Motamedifar,Maryam Sharifzade Javidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Statement of the Problem: Dental caries is one the most prevalent diseases that affects humans throughout their lives. Streptococcus mutans (S. mutans) is recognized as the most important microorganism during tooth cariogenicity. Reducing this germ in oral cavity can reduce the rate of tooth decays in humans.Purpose: The present study compared the antimicrobial activity of ethanolic extract of Peganum harmala L. seeds and 0.2% chlorhexidine on S. mutans.Materials and Method: Agar diffusion technique and micro broth dilution method were employed to test the antimicrobial effects of these two agents on S. mutans. Moreover, the cytotoxicity of ethanolic extract of P. harmala was studied on Vero cells by MTT (thiazolyl blue tetrazolium dye) colorimetric method. The data were analyzed with descriptive methods.Results: Concentrations of 50, 25, and 12.5 mg/mL of the extract made inhibition zones of bacterial growth around the wells; but, lower concentrations could not inhibit the growth of S. mutans. Besides, the antimicrobial effect of 0.2% chlorhexidine was more than 50 mg/mL of the extract. Minimum inhibitory concentration (MIC) of the extract on S. mutans was 1.83±0.6 mg/mL and minimum bactericidal concentration (MBC) was 4.3±1 mg/mL. The MIC and MBC for 0.2% chlorhexidine were reported to be 0.19 mg/mL, and 0.78 mg/mL, respectively. The extract concentrations more than 0.5 mg/mL were toxic and caused more than 50% Vero cell death.Conclusion: Despite the remarkable antimicrobial effects of high concentrations of P. harmala on S. mutans, high cell toxicity of this plant would restrict its in vivo therapeutic use.
- انتشار مقاله: 16-03-1394
- نویسندگان: Mohammad Motamedifar,Hengameh Khosropanah,Shima Dabiri
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Statement of the Problem: Herpes simplex virus (HSV) infection is one of the most common and debilitating oral diseases; yet, there is no standard topical treatment to control it. The extract of Aloe vera leaves has been previously reported to have anti-inflammatory, antibacterial, and also antiviral effects. There is no data on anti-Herpes simplex virus type 1 (HSV-1) activity of Aloe vera gel.Purpose: This study aimed to evaluate the anti-HSV-1 activity of Aloe vera gel in Vero cell line.Materials and Method: In this study, gel extraction and cytotoxicity of various increasing concentrations of Aloe vera gel (0.2, 0.5, 1, 2, and 5%) was evaluated in Dulbecco’s Modified Eagle Medium (DMEM) containing 2% fetal bovine serum (FBS). Having been washed with phosphate buffered saline, 50 plaque-forming units (PFU) of HSV-1 was added to each well. After 1 hour of incubation at 37°C, cell monolayers in 24 well plates were exposed to different increasing concentrations of Aloe vera gel. The anti-HSV-1 activity of Aloe vera gel in different concentrations was assessed by plaque reduction assays. Data were analyzed by using One-way ANOVA.Results: The cytotoxicity assay showed that Aloe vera in prearranged concentrations was cell-compatible. The inhibitory effect of various concentrations of Aloe vera was observed one hour after the Vero cell was infected with HSV-1. However, there was no significant difference between two serial concentrations (p> 0.05). One-way ANOVA also revealed no significant difference between the groups. The findings indicated a dose-dependent antiviral effect of Aloe vera.Conclusion: The findings showed significant inhibitory effect of 0.2-5% Aloe vera gel on HSV-1 growth in Vero cell line. Therefore, this gel could be a useful topical treatment for oral HSV-1 infections without any significant toxicity.Key Words: Aloe vera; Herpes Simplex Virus-1; Herbal Medicine; Antiviral; Cell Culture
- انتشار مقاله: 18-12-1393
- نویسندگان: Fahimeh Rezazadeh,Maryam Moshaverinia,Mohammad Motamedifar,Montazer Alyaseri
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Statement of the Problem: Dental caries is the most common disease of childhood. Using probiotics has recently been introduced to reduce the incidence of dental caries.It consists of live microbial food supplements that beneficially affect the host, and hence are considered an alternative way to eradicate the infections.Purpose: The aim of this study is to evaluate the effect of consumption of probiotic yogurt on the children’s salivary cariogenic microflora.Materials and Method: A double-blind randomized study was performed recruiting 2 parallel groups; 24 healthy children in the case and 25 children in the control group. All healthy children were followed- up over 4 periods. Periods 1 and 3 were wash-out periods with duration of 1 and 2 weeks, respectively. During periods 2 and 4 (2weeks duration each), the case group consumed 200g yogurt containing Bifidobacterium lactis (1×106 per gram) once daily and the control group consumed normal yogurt. Salivary Streptococci mutans and Lactobacilli were enumerated before and after the yogurt consumption periods. Pre- and post-treatment values within and between regimens were compared using the t-test and paired samples.Results: There was a reduction in Streptococcus mutans and Lactobacillus counts in the control group, but for Streptococcus mutans, the count reduction between phases 1 and 4 was statistically significant (p= 0.009). In the case group, neither the Streptococcus mutans count nor the Lactobacilli count was significantly reduced.Conclusion: Based on the findings of this study, short-term daily consumption of probiotic yogurt containing Bifidobacterium lactis could not reduce the levels of salivary Streptococcus mutans and Lactobacilli in 6 to 12 year-old children, while normal yogurt could reduce the Streptococcus mutans counts significantly.
- انتشار مقاله: 03-12-1392
- نویسندگان: Ali Nozari,Mohammad Motamedifar,Nasim Seifi,Zeynab Hatamizargaran,Mohammad Ali Ranjbar
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pharmaceutical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: influenza virus,Olive leaf,MDCK cell line
- چکیده:
- چکیده انگلیسی: The influenza viruses are major etiologic agents of human respiratory infections, and inflict a sizable health and economic burden. This study examines the antiinfluenza virus activity of hydroalcoholic extract of olive leaves (OLHE). Olive leaves were collected from gardens around the city of Shiraz, characterized, dried, ground to powder, and its hydroalcoholic extract was prepared. The influenza viruses were isolated from patients and characterized by standard antiinfluenza sera.Virucidal effects of OLHE (10-1 to 103 μg/ml) were examined in pretreatment, treatment and incubation protocols using quantal assay after incubation for 72 h. All experiments were performed three times in quadruplicates. Pretreatment of the cell line with OLHE for one hour followed by the addition of the virus was associated with virucidal effects (1 to 1000 μg/ml). OLHE added one hour after incubation of the virus with cell did not show antiviral effects. OLHE incubated with the virus for one hour, and then added to the cell line did have antiviral activity (1to 1000 μg/ml). The findings indicate that antiviral activity of OLHE occurred extra-cellularly, probably by changing the properties of membrane of the virus, rather than that of the cell, to prevent the virus from attaching and penetrating the cell line.
- انتشار مقاله: 30-11-1384
- نویسندگان: Ali Akbar Nekooeian,Afagh Moatari,Mohammad Motamedifard
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: histology,Vero cells,Rubella virus
- چکیده:
- چکیده انگلیسی: Background: Morphological changes of the cells infected with rubella virus cannot be observed easily. Estimation of the size of the cultured cells can be a valuable parameter in this condition. This study was conducted to find answers to the following questions:How much time after infection with rubella virus, the volume and surface area of the Vero cells and their nuclei get started to change?How is it possible to apply stereological methods to estimate the volume and surface area of the cultured cells using the invariator, nucleator, and surfactor techniques?Methods: The cultured Vero cells were infected with rubella virus. The cells of the control and experimental groups were harvested at 2, 4, 8, 24, and 48 hours following the incubation period. The cells were processed and embedded in paraffin. Invariator, nucleator, and surfactor were applied to estimate the size of the Vero cells and their nuclei.Results: The cell volume was decreased by 15-24%, 48 hours after the infection in comparison to the non-infected cells. Besides, the cell surface area was decreased by 13%, 48 hours after the infection. However, no changes were detected in the nuclei. The values of the standard deviation and coefficient of variation of the cells, estimated by invariator, were lower compared to those measured by the nucleator or surfactor.Conclusion: In this study, the volume and surface area of the Vero cells were reduced by rubella virus 48 hours after infection. Invariator is a more precise method compared to nucleator or surfactor.
- انتشار مقاله: 17-11-1392
- نویسندگان: Ali Noorafshan,Mohammad Motamedifar,Saied Karbalay-doust
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,HIV,Staphylococcus aureus,Methicillin-resistant staphylococcus aureus
- چکیده:
- چکیده انگلیسی: Extension of drug resistant Staphylococcus aureus strains is one of the problems of modern society. Presence of methicillin-resistant Staphylococcus aureus (MRSA) in HIV-infected individuals is an important cause of severe infections. Therefore, the main goal of this study was to determine the prevalence rate of MRSA carriage rate among HIV patients referring to the Shiraz HIV referral center (Shiraz, Iran) during 2011-2012. Nasal swabs were obtained from HIV positive patients and were cultured on differential and selective media to isolate Staphylococcus aureus, which was confirmed by standard biochemical tests. For isolation of MRSA isolates, bacterial suspensions were cultured on Muller-Hinton Agar containing NaCl and Oxacillin. Finally, data were analyzed by the SPSS software. Of 180 HIV patients, MRSA was isolated from nasal cavity of 23 (12.8%) patients. Most of the isolates were recovered from male subjects who were under 40 years old. No variables such as skin disease, history of hospitalization or infectious disease had significant association with the MRSA colonization rate. The presence of MRSA isolates in the nasal cavity of HIV patients in such a rate warns us about the potential spreading of MRSA among HIV patients in our society and emphasizes on establishing better prevention strategies.
- انتشار مقاله: 19-11-1392
- نویسندگان: Parvin Hassanzadeh,Yashgin Hassanzadeh,Jalal Mardaneh,Esmaeel Rezai,Mohammad Motamedifar
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Prevalence,HIV,Hepatitis B virus,Hepatitis Delta virus
- چکیده:
- چکیده انگلیسی: Evidence has shown that liver disease caused by hepatitis viruses can be more aggressive and severe in HIV infected subjects. Therefore, the present cross-sectional study aimed to evaluate the seroprevalence of HDV infection among HIV/HBV co-infected clients in Shiraz, southwest Iran. In this study, 178 patients co-infected with HBV and HIV individuals were enrolled. The diagnosis of HIV infection was documented based on serological assays. The demographic and complementary data were collected by a questionnaire. HBsAg and HDV Ab were detected by commercial quantitative enzyme linked immunosorbent assay kits according to the manufacturer’s instructions. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were also measured. The mean age of the participants was 37.4±7.4 years (range 22-63). 175 (98.4 %) patients were male and 3 (1.6 %) were female. Among 178 patients co-infected with HIV/HBV, 35 cases (19.7%, 95% CI: 14%-25%) were anti-HDV positive and 143 (80.3%) were negative for anti-HDV. HDV exposure in HIV/HBV co-infected patients was associated with blood transfusion (P=0.002, OR: 14.3) and prison history (P=0.01, OR: 2.31) but not with age, marital status, unsafe sex contact, and injection drug abuse. Our data showed a relatively high prevalence of HDV infection in HIV infected population in Shiraz, Iran. The high frequency of HDV Ab in patients with blood transfusion and prison history reveals that HDV transmission occurs more frequently in the parental route than sexual contacts; therefore, blood screening for HDV diagnosis in the high-risk group is recommended.
- انتشار مقاله: 10-02-1393
- نویسندگان: Mohammad Motamedifar,Mohammad Taheri,Kamran Bagheri Lankarani,Mina Gholami,Mahmood Amini Lari,Hossein Faramarzi,Jamal Sarvari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Polymerase Chain Reaction,Antibiogram,Otitis media with effusion,antibacterial resistance
- چکیده:
- چکیده انگلیسی: Background: Otitis media with effusion is one of the leading causes of hearing loss in children. Effective treatment of effusion in the middle ear requires appropriate empirical treatment and characterization of responsible pathogens. Objective of the present study was to detect pathogens in clinical samples from patients with otitis media with effusion in our area and to determine the sensitivity profile of isolated organisms to commonly used antibiotics.
Methods: Sixty three samples of middle ear effusion were aseptically obtained from 36 children, who had been treated up to at least two weeks before sampling. They were analyzed using standard bacteriological and multiplex polymerase chain reaction (PCR) assays. Antibiotic susceptibility tests were also performed.
Results: PCR analysis showed that DNA of Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis were present in 60 (95.2%) of the samples. The culture-positive effusion for Streptococcus Pneumoniae, HaemophilusInfluenzae and Moraxella catarrhalis was 34.9%. Almost all isolates of Streptococcus pneumoniaee were sensitive to ciprofloxacin and erythromycin, and none of them was sensitive to co-trimoxazole. None of H. Influenzae isolates was sensitive to erythromycin, cefixim, co-trimoxazole, ampicillin and amoxicillin. None of M. Catarrhalis isolates was sensitive to ceftriaxone, co-trimoxazole, ampicillin and amoxicillin.
Conclusion: Compared with other studies using PCR method, the number of H. influenza isolates was in higher in the present study (95.2%). Antibiotic sensitivity profiles of pathogens isolated in this study were different from others. Thus, we can determine empirical antibiotic therapy based on sensitivity profile in our geographic area.- انتشار مقاله: 08-02-1393
- نویسندگان: Mahmood Shishegar,Abolhasan Faramarzi,Tayyebe Kazemi,Akbar Bayat,Mohammad Motamedifar
- مشاهده