Journal of Research in Medical Sciences
Volume:27 Issue: 5, May 2022

Methicillin resistance Staphylococcus aureus (MRSA) is one most important pathogens for human health. The ability of this organism for producing different kinds of disease is related to its virulence gene. The frequency of hemolysin alpha (hla), hemolysin beta (hlb), and exfoliative toxin A (eta) virulence genes of MRSA was evaluated, and the association of these genes with antibiotics susceptibility was  nvestigated.

In a cross?sectional study, a total of 695 Staphylococcus clinical samples from seven different provinces of Iran were evaluated. MRSA was detected by cefoxitin disk. Virulence genes were detected by polymerase chain reaction. Susceptibility to clindamycin and ciprofloxacin was evaluated according to the Clinical and Laboratory Standards Institute guideline.

From a total of 695 samples, 170 (24.46%) were found to be MRSA. 142, 82, and 132 samples of MRSA were hla, hlb, and eta positive, respectively. hla gene was significantly found more frequently in patients at least 18 years (P = 0.02). 105 (68.6%) and 93 (59.6%) of MRSA samples were resistance to ciprofloxacin and clindamycin, respectively. hlb gene was significantlymore resistant to clindamycin (P = 0.04) and ciprofloxacin (P = 0.01). Logistic regression analysis displayed hlb?positive MRSA strainswere significantly associated with ciprofloxacin (odds ratio [OR]: 3.6, 95% confidence interval [CI] = 1.637–8.00) and clindamycin (OR:1.93, 95% CI 1.00–3.68).

MRSA strains from  taphylococcus aureus which isolated from hospitalized Iranian patients are significantly resistant to clindamycin and ciprofloxacin and it is may be because of hlb virulence gene. These samples consist of both community?acquired MRS) and health?care associated MRSA, so we could not use this finding as a guide for local antibiotics usage.

Our objective was to determine the overall prevalence of nonalcoholic fatty liver disease (NAFLD) in women with polycystic ovarian syndrome (PCOS) in our sample population. The second aim was to evaluate the predictive value of body mass index (BMI), waist circumference (WC), and visceral fat for the onset of NAFLD in these patients.

This cross?sectional study was performed on 71 women with PCOS who were referred to Arash Women’s Hospital in Tehran. Demographic and clinical information and anthropometric and biomedical indices were collected by a trained nurse. Liver  ltrasonography was performed for all participants by a radiologist.

NAFLD was identified in 53.5% (n = 38) of subjects and the frequency of mild, moderate, and severe grades were 65.8%, 31.6%, and 2.6%, respectively. BMI and visceral fat of patients with NAFLD were significantly higher than non?NAFLD (P < 0.001). Receiving operating characteristic (ROC) curve analysis revealed that BMI wasthe best indicator of predicting NAFLD (cutoff = 25.5 kg/m2, sensitivity 75%, and specificity 75%), whereas visceral fat (cutoff = 5.5%, sensitivity 79%, and specificity 67%) and WC (cutoff = 89.5 cm, sensitivity 73%, and specificity 64%) were inferior for predicting NAFLD in PCOS patients.

The prevalence of NAFLD in the study population is high. Our findings supported the use of BMI as a simple and practical  redictive factor for the NAFLD onset, with a cutoff level of 25.5. The use of this cutoff level will enable physicians to identify PCOS patients at risk for NAFLD.

The ratio of partial pressure of oxygen in arterial blood (PaO2) to the fraction of inspiratory oxygen concentration (FiO2) is an indicator of pulmonary shunt fraction. PaO2/FiO2 (P/F) ratio is used to classify severity of acute respiratory distress syndrome (ARDS). With the same shunt fraction, P/F ratio decreases with increases in FiO2 which may lead to errors in classifying severity of ARDS. The effect of FiO2 on P/F ratio has not been investigated in COVID?19 pneumonia. In this study, we estimated the best FiO2 for the calculation of P/F ratio in a sample of patients with ARDS due to COVID?19 pneumonia.

Blood gas and ventilatory data of 108 COVID?19 ARDS patients were analyzed in a cross?sectional observational study. Using Oxygen Status Algorithm the calculated shunt fraction served a basis for calculating P/F ratio for different FiO2. The severity of ARDS determined by P/F ratios at each FiO2s was compared with the shunt?based severity to find the optimum FiO2 for calculation of P/F ratio so the resulting classification has the best match with the reference classification.

A FiO2 of 1.0 for calculation of P/F ratio and ARDS classification showed the best match with shunt?based ARDS classification. A regression model was obtained with the PaO2, patient’s original FiO2, Hemoglobin concentration, and SaO2 as the independent predictors of the P/F ratio for the FiO2 of 1.0.

This study shows a FiO2 of 1.0 as the best value for correct calculation of P/F ratio and proper classification of ARDS.

The objective of this study was to evaluate the antibiotic resistance pattern of Helicobacter pylori strains isolated from patients in Isfahan province.

Gastric antrum biopsy specimens of patients undergoing endoscopy were cultured. The samples with the growth of H. pylori underwent antibiotic susceptibility test by disk diffusion method.Reaults: Of 96 samples, 50 samples (53%) were positive for H. pylori. The rates of antibiotic resistance were as follows: amoxicillin, 6%;  zithromycin, 20%; furazolidone, 22%; levofloxacin, 16%; metronidazole,  0%; rifampin, 12%; and tetracycline, 22%.

H. pylori strainsin our area have high rates of resistance to azithromycin, levofloxacin,  etronidazole, tetracycline, and furazolidone.

Cardiovascular diseases (CVD) comprise of various heart and blood vessels?related diseases. Acute coronary syndrome (ACS) is one of them. Basic researchers and cardiologists have witnessed landmark developments related to ACS and despite rapid refinement in our understanding; scientists are seeking answers for more questions. Scientists have mapped wide ranging proteins and intricate protein networks which play central role in the pathogenesis in ACS. In this review, we have attempted to summarize underlying causes of ACS. Better understanding of the disease pathology will enable us to get a step closer to an effective clinical management.

This study aims to evaluate the effect of symbiotic (Pedilact) on the treatment of infantile colic.

In this randomized clinical trial in Zanjan, Iran, 76 infants with infantile colic were assigned to two groups of 38 cases using block randomization. The intervention group received 5 drops of Pedilact, a symbiotic containing Lactobacillus reuteri and simethicone (20 mg twice daily), and the control group received placebo in addition to simethicone for 4 weeks. Daily crying time, number of crying attacks per day, and sleep duration were recorded on days 1, 7, 14, 21, and 28, and the results were compared.

Thirty?three infants in the intervention group and 35 infants in the control group were enrolled. There was no significant difference between the two groups in terms of age, gender, gestational age, maternal age, type of delivery, type of feeding, and weight at the beginning and the end of the study (all P > 0.05). Daily crying time in the control and intervention groups decreased from 240 and 210 min/day, respectively, to 0 min/day in both the groups. Daily crying attacks decreased from 5 and 4/ day in the control and intervention groups, respectively, to 0/day. Sleep duration in both the groups increased from 720 to 840 and 930 min/day in the control and intervention groups, respectively, but the changes were not significant (P = 0.56, P = 0.52, and P = 0.13, respectively).

We did not find a significant improvement in colic symptoms in infants receiving symbiotic compared to placebo.