Background
Carbapenems resistant hypervirulent strains of Klebsiella pneumoniae are one of the most critical organisms that cause fatal nosocomial infections. This study aimed to detect and characterize K. pneumoniae virulence genes (mrkD, entB, rmpA, K2, kfu, and magA) and carbapenem resistant (blaNDM, blaIMP, blaOXA−48, and blaKPC) genes
Methods
Sixty K. pneumoniae strains were isolated from urine, blood, wound swab, and sputum samples, in two age groups: neonates and adults. String test was used to detect hypervirulent strains. Susceptibility testing for a wide range of antibiotics was performed on all isolates. DNA was extracted by the guanidine chloride method, then multiplex PCR was used for the detection of carbapenem-resistance and virulence genes.
Results
Seventy percent of the isolates were resistant to ceftazidime and 8% to imipenem, 35% were multi-drug resistant, and 7% extensively drug-resistant, all neonatal blood isolates (n = 15) were resistant to ceftazidime. entB was the most predominant virulence gene (93.3%), followed by mrkD (78.3%), kfu (60%), K2 (51.7%), magA (18.3%) and rmpA (5%). blaOXA−48 was the most predominant carbapenem-resistant gene (68.3%), followed by blaNDM (10%), blaKPC (8.3%), and blaIMP (3.3%). Eight hyper-virulent strains were positive for blaOXA−48 and two for blaNDM genes. The study concluded that there is a high rate of carbapenems resistant genes in hyper-virulent strains of K. pneumoniae isolated from hospitalized patients.
Conclusion
The study reported for the first time in Sudan presence of carbapenems resistant genes in hyper-virulent strains of K. pneumoniae isolated from hospitalized patients. Presence of MDR and XDR strains of K. pneumoniae in neonatal ward in some Sudanese hospitals.
Introduction. Data examining the health of menopausal women and the prevalence of osteoporosis remain to be limited in Africa, especially in sub-Saharan countries. Thus, in this current study, we aimed to assess the atherogenic index of plasma (AIP) and anthropometric measurements of osteoporotic postmenopausal women and determine their risk for cardiovascular disease (CVD). Methods. This is a cross-sectional, community-based study. Postmenopausal women (n = 300), aged ≥45 years, were recruited from Khartoum state, Sudan. Dual-energy X-ray absorptiometry was used to assess bone density. Weight, height, and waist circumference were measured twice. Fasting blood samples (5 ml) were collected to determine total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C). AIP was calculated as an indicator of CVD risk. Results. The mean age of the postmenopausal women was 61.6 ± 10.2 years (range 47–90 years). Women (n = 80) had the normal T-score, and an equal number had osteoporosis (n = 110) and osteopenia (n = 110). The prevalence of osteoporosis was 36.7%. Many postmenopausal women with normal T-scores suffered from general (71.2%) and central (94%) obesity. Postmenopausal women had high TC (24.4%), TG (25.6%), LDL-C (13.7%), and low HDL-C (76.0%) levels. Osteoporotic women (36.4%) were found to have a medium to high risk of CVD as determined by AIP. Women with normal T-scores had a higher number of CVD risk factors. A positive correlation was noted between AIP and TC among osteopenic (r = 0.292;
P
=
0.002
) and osteoporotic women (r = 0.265;
P
<
0.001
). Conclusion. Osteoporosis was prevalent among Sudanese postmenopausal women who also had an increased risk for CVD. Public health education about osteoporosis and CVD risk is thus recommended.
Background: Antimicrobial resistance (AMR) poses a complex threat to global health security and universal health coverage. Over recent decades, there has been an increase globally in reports of nosocomial infections caused by carbapenem-resistant Gram-negative bacilli (GNB). We aimed to explore the molecular characterization and detection of genes associated with carbapenem producing Gram negative bacteria isolated from hospitalized patients in Soba University Hospital (SUH) in Khartoum State, Sudan. Results: A total of 206 GNB clinical specimens were collected between October 2016 and February 2017 from hospitalized patients in SUH. Of 206 carbapenem resistance isolates, 171 (83%) were confirmed as phenotypically resistant and 121 (58.7%) isolates harboured one or more carbapenemase genes. New Delhi metallo-β-lactamase (NDM) types were the most predominant genes, blaNDM 107(52%). Others included blaIMP 7 (3.4%), blaOXA-48 5(2.4%) and blaVIM 2 (0.9%) Co-resistance genes with NDM producing GNB were detected in 87 (81.3%) of all blaNDM producing isolates. NDM1 was the most frequent subtype observed in 75 (70 %) blaNDM producing isolates.Conclusions: The frequency of carbapenemase producing bacilli was found to be high in SUH. NDM was found to be the most prevalent carbapenemase gene among clinical isolates. Close surveillance across all hospitals in Sudan is required. The relative distribution of carbapenemase genes among GNB in nosocomial infections in Africa needs to be defined.
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