Introduction Diabetes remains a growing public health concern in Egypt, as prevalence of Type II diabetes (TIID) has nearly tripled there in the last two decades. Egypt was ranked ninth worldwide in number of diabetes cases, with prevalence of 15.56% among adults. Recent studies have proposed that disturbance of gut microbiota could influence TIID development and indicated associations between a reduced diversity in microbiomes and Type I diabetes (TID). In the present study, we investigated the composition and abundance of the bacterial microbiome in disease state (TID and TIID) of Egyptian patients. Our goal in this study was to characterize features of the gut microbiota and possible differences associated with TID and TIID in this population. Methods DNA was extracted from fecal samples taken from 22 TID and 18 TIID outpatients of Al-Hussein hospital, Cairo, Egypt. 16S rRNA amplicon sequencing was used to characterize the bacterial taxa and these reads were processed using the software mothur with analysis utilizing packages vegan, phyloseq and metagenomSeq in R. Results and conclusions Our results highlighted a significant increase in abundance of Gram negative, potentially opportunistic pathogenic taxa (Pseudomonas, Prevotella) in all diabetic groups, compared to the control. Lipopolysccharide (LPS), a component of the gram-negative bacterial wall, can activate local immune response and may result in low-grade systemic inflammation contributing to insulin resistance. The gram-positive Gemella, which is associated with increased risk to diabetes, also had a significant increase in abundance in all diabetic groups, compared to the control. In contrast, the commensal bacterial taxa Turicibacter, Terrisporobacter and Clostridium were found to be more abundant in the control group than
The formula containing 3% lecithin and 20% pluronic F127 exhibited superior skin permeation and antimicrobial activity over propolis suspension in water.
Purpose. Infective endocarditis (IE) is a major complication in patients with bacteremia of Staphylococcus (S.) aureus infection. Our aim was to determine the association of the major Staphylococcal superantigens (SAgs), including Staphylococcal enterotoxins (SEs) and toxic shock syndrome toxin-1 (TSST-1), among hospitalized patients diagnosed with bacteremia and those with IE. Methods. This study was conducted on 88 patients; of these, 84 (95.5%) had two positive blood cultures. Eighteen out of the 84 patients (21.4%) were diagnosed based on the modified Duke criteria by a cardiologist to have IE. The recovered isolates were screened phenotypically using ELISA followed by molecular analysis of sea, seb, sec, sed, see, and tsst-1, the major SAg coding genes, and the obtained findings were statistically analyzed. Results. Phenotypic screening for SE production of 26 selected Staphylococci (15 isolated from the IE patients (10 S. aureus and 5 coagulase negative staphylococci (CoNS)) and 11 from bacteremic patients (10 S. aureus and 1 CoNS)) using ELISA revealed that 12/26 (46%) isolates were SE producers. PCR analysis showed that 19 (73%) isolates were PCR positive for SAg genes with the highest prevalence of the sea gene (79%), followed by seb (63%) and tsst-1 (21%). The least frequent gene was sed (5.3%). Statistical correlations between bacteremic and IE isolates with respect to prevalence of SAgs showed no significant difference ( P value = 0.139, effect size = 0.572 ) indicating no specific association between any of the detected SAgs and IE. Conclusion. There is high prevalence of SEs among clinical isolates of Staphylococci recovered from patients suffering bacteremia and those with IE. No significant difference was found among Staphylococcal isolates recovered from patients with bacteremia or IE regarding both phenotypic and genotypic detection of the tested SAgs.
31Aim: Infective endocarditis (IE) is a major complication of Staphylococcus (S.) aureus infection 32 in humans particularly those with bacteremia. Although Staphylococcus species are commensal 33 on or in different parts of the human body, it is also known to be a serious pathogen causing 34 bacteremia and sepsis that could lead to IE. Therefore, our aim was to assess the prevalence as 35 well as phenotypic and genotypic association of the Staphylococcal superantigens (SAgs) among 36 bacteremic and IE patients.37 Methods: This study was conducted on Staphylococcus isolates recovered from bacteremic and 38 IE patients. The isolates were screened phenotypically for the detection of SAgs including 39Staphylococcal enterotoxins (SEs) and toxic shock syndrome toxin-1 (TSST-1). Molecular 40 detection and analysis of sea, seb, sec, sed, see and tsst-1, the major SAgs coding genes were 41 performed using PCR and agarose gel electrophoresis, respectively. The obtained findings were 42 statistically analyzed using standard methods. 43Results: Detection of SAgs using ELISA revealed that 12 (46%) isolates were positive for 44 enterotoxin production. However, the PCR revealed that 19 (73%) isolates were positive for 45 enterotoxin genes with the highest prevalence of the sea gene (79%), followed by the seb (63%), 46 tsst-1 (21%). The least frequent gene was the sed (5.3%). Accordingly, phenotypic and genotypic 47 screening for prevalence of SAgs among Staphylococcal isolates showed significant difference 48 (P value =0.046703), however, no significant correlation could be observed among the coagulase 49 negative Staphylococci (CoNS) isolates (P value =0.248213). Statistical correlations between 50 bacteremic and IE isolates with respect to prevalence of SAgs, showed no significant difference 51 (P-value = 0.139, Effect size = 0.572) indicating no specific association between any of the 52 detected SAgs and IE. 3 53 Conclusion: no significant difference has been found between Staphylococcal IE and bacteremia 54 isolates regarding both phenotypic and genotypic detection of the most commonly SAgs. 55 Therefore, all Staphylococcal bacteremic patients are suspected for IE. Also, future work should 56 be conducted for analysis of SAgs gene expression. 57 58 59 Introduction 60 S. aureus is a dangerous and versatile human pathogen because of its ability to cause various 61 types of infections, including skin and soft tissue sepsis, pneumonia, bloodstream infections 62 (BSIs), osteomyelitis and infective endocarditis (IE) [1]. Higher mortality rate (15-25%) was 63 recently reported from serious S. aureus infections, particularly bacteremia and endocarditis 64 [2,3]. IE is a major devastating complications of Staphylococcal bacteremia [3,4]. In 2018, 65 Asgeirsson et al. reported that S. aureus is the foremost cause of IE where it comprises about 15-66 40% of all IE cases worldwide [3]. 67 IE is caused principally with bacteria or fungi where serious clinically relevant complications 68 including, damaging of one or more of the ...
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Antibiotic resistance has become one of the most common problems that threaten the world and increases the mortality rate. Pseudomonas aeruginosa is reported to be one of commonest multi-drug resistant (MDR), which is responsible for 10 to 15% of nosocomial infection worldwide and high death rates ranging from 18 to 61%. We investigate the anti-biofilm activity of different disinfectants on MDR Pseudomonas aeruginosa. Two hundred two water environmental isolates were collected from different hospitals in Cairo, Egypt. Microbact™ Gram-negative system used for identification. That is showed 41.3% of isolates were Pseudomonas aeruginosa. Antibiotic susceptibility test revealed that 34.7% of the isolates were MDR. Biofilm production was determined by Congo red assay (CRA) and Microtitre plate (MTP) method. CRA showed 89% as biofilm producers. MTP method showed 87% were biofilm-forming. MIC of Carbapenems was determined by the broth macrodilution method. It showed that 50% of isolates were resistant. (MIC) Minimum Inhibitory Concentration of 7 disinfectants against 10-selected MDR strong biofilm Pseudomonas isolates was determined using the broth microdilution method. It showed that the most effective disinfectants with the lowest MICs were the Sodium hypochlorite 5% and Povidone-Iodine 10%. The Real-time PCR was done on lasR and ndvb genes for the selected isolate (E20) before and after exposure to both effective disinfectants. The sample E20 showed a significant down regulation for lasR and ndvb genes with both effective disinfectants. Our study showed that Povidone-iodine 10 % at appropriate concentrations at less than 30 minutes has significant anti-biofilm activity against MDR Pseudomonas aeruginosa.
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