scholarly journals Nasal Carriage and Methicillin Resistance of Staphylococcus aureus among Schoolchildren in Sana’a City, Yemen

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Arwa Mohammed Othman ◽  
Belques Sharaf Al-Huraibi ◽  
Rowa Mohammed Assayaghi ◽  
Huda Zaid Al-Shami
Keyword(s):  
Staphylococcus Aureus ◽  
Hospital Admission ◽  
Methicillin Resistance ◽  
Positive Culture ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
High Morbidity ◽  
Carriage Rate ◽  
Cross Sectional ◽  
Nasal Swabs

Background. Staphylococcus aureus (S. aureus) is a frequent cause of serious health problems with high morbidity and mortality. The risk of S. aureus infections is increased with the emergence of methicillin-resistant S. aureus (MRSA). This study aims to determine the nasal carriage rate of both S. aureus and MRSA among schoolchildren in Sana’a city. Methods. This is a cross-sectional study conducted from January 2018 to May 2020. Five hundred and thirty-six students were enrolled. Their age ranged from 5 to 19 years with the mean age and standard deviation equal to 13.3 ± 3.5 years. Nasal swabs were collected from each student for culturing and methicillin susceptibility testing. Results. Students with positive culture were 271 (51%) males and 265 (49%) females. S. aureus was isolated from 129 (24%) students whereas the overall prevalence of MRSA was 8 (1.5%). S. aureus was significantly recovered from students at the age group of 10–14 years (χ2 = 7.02; p = 0.03 ), females than males (OR = 1.96; χ2 = 10.75; p = 0.001 ), and students who were admitted into hospitals (OR = 1.6; χ2 = 4.89; p = 0.03 ). Nevertheless, there were no significant differences between MRSA carriage and students’ age (χ2 = 2.3; p = 0.32 ), gender (OR = 1.02; χ2 = 0.001; p = 0.63 ), and hospital admission (OR = 1.4; χ2 = 0.25; p = 0.62 ). Conclusions. The prevalence of MRSA is low among schoolchildren in Sana’a city. Age, gender, and previous hospital admission were statistically associated with nasal carriage of S. aureus but not MRSA nasal carriage.

scholarly journals Nasal Carriage and Methicillin Resistance of Staphylococcus Aureus Among Schoolchildren in Sana’a City, Yemen

2020 ◽  
Author(s):  
Arwa Mohammed Othman ◽  
Belques Sharaf Al-Huraibi ◽  
Rowa Mohammed Assayaghi ◽  
Huda Zaid Al-Shami
Keyword(s):  
Staphylococcus Aureus ◽  
Hospital Admission ◽  
Methicillin Resistance ◽  
Positive Culture ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
High Morbidity ◽  
Carriage Rate ◽  
Cross Sectional ◽  
Nasal Swabs

Abstract Background: Staphylococcus aureus (S. aureus) is a frequent cause of serious health problems with high morbidity and mortality. The risk of S. aureus infections is increased with the emergence of methicillin-resistant S. aureus (MRSA). The aim of this study is to determine the nasal carriage rate of both S. aureus and MRSA among schoolchildren in Sana’a city.Methods: This is a cross-sectional study conducted from January 2018 to May 2020. Five hundred and eighty eight students were enrolled. Nasal swabs were collected from each student for culturing and methicillin susceptibility testing. Results: Out 588 nasal swab, 536 yielded bacterial growth. Students with positive culture were 271(51%) males and 265(49%) females. Their age ranged from 5 to 19 years old with mean age and standard deviation equaled to 13.3±3.5 years. S. aureus was isolated from 129 (24%) students whereas the overall prevalence of MRSA was 8(1.5%). S. aureus was significantly recovered from students at age group 10-14 years (χ2 = 7.02, p = 0.03), females than males (OR= 1.96, χ2 = 10.75, p = 0.001), and students who were admitted into hospitals (OR= 1.6, χ2 = 4.89, p = 0.03). Nevertheless, there were no significant differences between MRSA carriage and students’ age (χ2 = 2.3, p = 0.32), gender (OR= 1.02, χ2 = 0.001, p = 0.63), and hospital admission (OR= 1.4, χ2 = 0.25, p = 0.62). Conclusions: The prevalence of MRSA is low among schoolchildren in Sana’a city. Age, gender and previous hospital admission were statistically associated with nasal carriage of S. aureus but not MRSA nasal carriage.

scholarly journals HOSPITALIZED PATIENTS

2016 ◽  
Vol 23 (07) ◽  
pp. 795-801
Author(s):  
Muhammad Saeed ◽  
Farhan Rasheed ◽  
Shahida Hussain ◽  
Maqsood Ahmad ◽  
Mizna Arif ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Clinical Laboratory ◽  
Methicillin Resistance ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
Hospitalized Patients ◽  
Coagulase Negative Staphylococcus ◽  
Biochemical Tests ◽  
Carriage Rate ◽  
Cross Sectional

Objectives: An alarming rise in Methicillin resistant Staphylococcus aureus(MRSA) associated hospital based infections has been reported in recent decades.Prolongedhospital stay, unhygienic health services are confined to this challenging serious problem.Anterior nares of humans are a natural reservoir for Staphylococcus aureus with asymptomaticcolonization. This study was designed to determine the prevalence of nasal carriage rate ofMRSA among hospitalized patients. Study Design: Cross sectional study. Setting: PunjabInstitute of Cardiology, Lahore, Pakistan. Period: January 2013- 2014. Materials & Methods:Nasal swabs were collected from hospitalized patients. Total 2,440 patients were screened forthe nasal carriage of MRSA. Microbiologically, identification of S. aureus was done on the basisof colony morphology, Gram staining and biochemical tests. Identified isolates of S. aureus werefurther tested for cefoxitin susceptibility testing, following the technique of modified Kirby Bauer discdiffusion using Mueller-Hinton agar as per Clinical Laboratory Standards Institute (CLSI) guidelines2013. Results: Out of total 2,440 nasal swabs, 60.45% (1475/2440) were Staphylococcusspecies. Among Staphylococcus group, 86.10% (1270/1475) were Staphylococcus aureus.The frequency of MRSA and MSSA (Methicillin sensitive Staphylococcus aureus) was 5.20%(66/1270) and 94.8% (1204/1270) respectively. Overall nasal carriage of MRSA is 2.70%(66/2440). The coagulase negative Staphylococcus were found in 205 (13.90%) cases whileMRSE (Methicillin resistance Staphylococcus epidermdis) were found in only 7 (3.41%) cases.Conclusion: Overall nasal carriage rate of MRSA was 2.70%.

A cross sectional study to assess nasal carriage of methicillin resistant Staphylococcus aureus in healthcare professionals in a tertiary care hospital

2020 ◽  
pp. 1-12
Author(s):  
Fibhaa Syed ◽  
Nasim Akhtar ◽  
Mohammad Ali Arif ◽  
Adil Ramzan ◽  
Rauf Niazi ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Healthcare Workers ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Tertiary Care ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
Diffusion Method ◽  
Cross Sectional ◽  
Methicillin Resistant ◽  
Nasal Swabs

Abstract Objective: To determine the nasal carriage of staphylococcus aureus and methicillin-resistant staphylococcus aureus among healthcare workers in a tertiary care setting. Methods: The cross-sectional study was conducted at the Pakistan Institute of Medical Sciences, Islamabad, Pakistan, from April to July 2018, and comprised healthcare workers at the institution. Nasal swabs were collected and cultured on Mannitol salt agar. Mannitol fermenting colonies which were gram-positive cocci, catalase-positive and coagulase-positive were identified as staphylococcus aureus. Antibiotic susceptibility test was performed by modified Kirby-Bauer disc diffusion method. Methicillin resistance was detected using cefoxitin disc diffusion method. Data was analysed using SPSS 23. Results: Of the 210 nasal swabs, 52(24.76%) had a staphylococcus aureus growth, and, of them, 15(7.1%) were methicillin-resistant. No association could be established with either any single category of healthcare worker or an inter-department variation (p>0.05). Likewise, there was no association with age, gender, duration of service, smoking, co-morbidities, use of antibiotics in the preceding six months, treating a patient with methicillin-resistant staphylococcus aureus in the preceding six months and hospitalisation in the preceding year (p>0.05). Conclusion: The frequency of nasal carriage of methicillin resistant staphylococcus aureus amongst healthcare workers was regardless of the nature of their professional engagement. Key Words: Methicillin resistant staphylococcus aureus, Nasal carriage, Continuous...

scholarly journals Molecular Characterization of Staphylococcus aureus Isolates Obtained from Hemodialyzed Patients at the Hospital de Clínicas of Paraguay: A pilot study

2017 ◽  
Vol 5 (1) ◽  
pp. 14-19 ◽  
Author(s):  
Rubén Arturo Silvero Isidre, ◽  
Fátima Rodríguez Acosta ◽  
César Rodrigo Cristaldo Vargas ◽  
Genaro Américo Velázquez Romero ◽  
José Félix Plans Perrota ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
Hemodialysis Patients ◽  
Cross Sectional ◽  
Methicillin Resistant ◽  
Multiple Locus ◽  
Probabilistic Sampling ◽  
Nasal Swabs ◽  
Variable Analysis

Background: Patients undergoing hemodialysis are susceptible to the nasal carriage of Staphylococcus aureus, increasing the risk of developing infections associated with higher morbidity and mortality. The objective of this study was to describe the frequency of S. aureus carriage in hemodialysis patients and to perform molecular analysis of isolates by applying multiple-locus variable analysis. Methods: We conducted a descriptive cross sectional study with non-probabilistic sampling that included 28 hemodialysis patients attending the Nephrology Department of Hospital de Clínicas in Asunción, Paraguay. We obtained clinical data from medical records and interviews with patients. Nasal swabs were collected and analyzed by microbiological and molecular methods. Results: The frequency of S. aureus carriage was 50% (14/28), 93% of which (13/14) were methicillin resistant, 57% (6/14) were gentamicin resistant and 36% (5/14) were resistant to more than 4 antibiotic classes. S. aureus carriers showed higher frequency of rhinitis (p=0.02 odds ratio [OR]=6.6 (1.2- 34.4)). Seven methicillin-resistant S. aureus isolates had been analyzed by multiple-locus variable analysis, two of them showed identical pattern bands. Conclusion: We found a high frequency of methicillin-resistant Staphylococcus aureus colonization and the presence of two isolates with identical profile in the multiple-locus variable analysis indicating the possibility of transmission between patients.

scholarly journals Prevalence, risk factors, phenotypic and molecular characteristics for Staphylococcus aureus carriage in community-based drug users in Guangzhou, China

2020 ◽  
Author(s):  
Yingying Wang ◽  
Jialing Lin ◽  
Junli Zhou ◽  
Zhigang Han ◽  
Zhenjiang Yao
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Drug Users ◽  
Nasal Carriage ◽  
Multidrug Resistant ◽  
Cross Sectional Study ◽  
Molecular Characteristics ◽  
Community Based ◽  
Cross Sectional ◽  
Nasal Swabs

Abstract Background: Staphylococcus aureus ( S. aureus ), particularly methicillin-resistant Staphylococcus aureus (MRSA), remains the predominant cause of infections in drug users. This cross-sectional study aims to elucidate the prevalence, risk factors, phenotypic and molecular characteristics of S. aureus carriage among community-based drug users. Methods: All eligible drug users, with both injection and non-injection route of drug administration , were asked to complete questionnaires and collect nasal swabs by trained personal during the period between May and December 2017 in Guangzhou, China. Swabs were processed for identification of S. aureus . Antimicrobial susceptibility test and polymerase chain reaction assays were used to detect phenotypic and molecular characteristics for identified isolates. Univariate and multivariate logistic regression analyses were used to assess risk factors for S. aureus carriage. Results: Overall, 353 drug users were included in the study and the prevalence of S. aureus carriage was 15.01% (53/353). The prevalence of MRSA carriage was 6.80% (24/353). Cohabitation was a risk factor for S. aureus (adjusted OR=8.80, 95% CI: 1.89-40.99). The proportion of multidrug resistance was 54.72% for S. aureus isolates and most of these isolates were resistant to penicillin, erythromycin and clindamycin. Seventeen MRSA isolates were multidrug resistant. The results of clonal complexes (CCs) and sequence types (STs) for S. aureus were diverse. The three predominant types for CCs were CC5 (64.15%, 34/53), CC59 (11.32%, 6/53), and CC7 (7.55%, 4/53); and for STs were ST188 (20.75%, 11/53), ST5 (11.32%, 6/53), and ST59 (11.32%, 6/53). Conclusion: The prevalence of S. aureus nasal carriage was lower while the prevalence of MRSA carriage was moderate compared to previous studies. Phenotypic and molecular characteristics of S. aureus isolates, particularly MRSA isolates, revealed high proportions of antibiotic resistance, indicating the existence of cross-circulation, and implying high opportunity of virulence-related diseases. Decolonization and antibiotic stewardship might be implemented for drug users with MRSA carriage.

scholarly journals Nasal Carriage Rate, Antimicrobial Susceptibility Pattern, and Associated Factors of Staphylococcus aureus with Special Emphasis on MRSA among Urban and Rural Elementary School Children in Gondar, Northwest Ethiopia: A Comparative Cross-Sectional Study

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Abiye Tigabu ◽  
Moges Tiruneh ◽  
Feleke Mekonnen
Keyword(s):  
Staphylococcus Aureus ◽  
Elementary School ◽  
School Children ◽  
Elementary School Children ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
Northwest Ethiopia ◽  
Carriage Rate ◽  
Cross Sectional ◽  
Rural Elementary School

Introduction. Staphylococcus aureus is a Gram-positive, catalase-positive, and coagulase-positive bacterial species commonly found on the skin and in the nose of most healthy individuals. The anterior nares of nose are the most frequent carriage sites for S. aureus in both adults and children. Methicillin resistance among S. aureus isolates has steadily increased worldwide. Objective. The main objective of this study was to determine nasal carriage rate, antimicrobial susceptibility pattern, and associated risk factors of Staphylococcus aureus with special emphasis on MRSA among urban and rural elementary school children in Gondar, Northwest Ethiopia. Method. A community based comparative cross-sectional study was conducted on 622 urban and rural elementary school children in Gondar from January 1st to March 30th, 2018. Data was collected using a questionnaire and nasal swab samples were collected by sterile cotton tip swab moistened with sterile normal saline. Collected samples were inoculated on mannitol salt agar and incubated aerobically at 37°C for 24 hrs. S. aureus was confirmed by observing colony characteristics and biochemical tests. MRSA was detected using cefoxitin disc by Modified Kirby-Bauer disk diffusion technique. Finally data was entered, cleared, and checked using Epi-info version 7 and exported to SPSS version 20 for analysis. Odds ratio and logistic regression were used for statistical association. P-value ≤ 0.05 at 95% CI was considered for statistical association. Result. Of the 622 school children, the overall prevalence of S. aureus was 143/622 (23%). Of them, 14/143 (9.79%) were MRSA. The carriage rate in urban schools was 83/622 (13.3%) whereas it was 60/622 (9.6%) in rural schools. The prevalence of MRSA among urban schools, 9.1%, was higher than their urban counterparts, 0.7%. Gentamycin, clindamycin, and ciprofloxacin were the most effective whereas penicillin and tetracycline were resistant. Children’s fathers’ educational status and number of children in class room were significantly associated with S. aureus but only living in urban of children significantly associated with MRSA. Conclusion. This study showed high prevalence of S. aureus and MRSA, 143/622 (23%) and 14/143 (9.79%), respectively. So, decolonization of nasal carriers of MRSA and reducing the number of students per classroom should be addressed. Moreover, regular large scale survey should be conducted to assess the burden and intervene accordingly.

scholarly journals Prevalencia de portación nasal de Staphylococcus aureus en niños con discapacidad

2016 ◽  
Vol 3 (1) ◽  
pp. 35
Author(s):  
Clotilde Molin ◽  
Elvira Del Valle Ortíz ◽  
Patricia Barrios Lezcano ◽  
Sonia Hermosa Sánchez ◽  
María González Santander ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Nasal Carriage ◽  
Cross Sectional Study ◽  
Carrier State ◽  
Disabled Children ◽  
Cross Sectional ◽  
Source Of Infection ◽  
Nasal Swabs ◽  
Invasive Infections ◽  
High Risk Factor

Introduction: Colonization of the nasal mucosa by Staphylococcus aureus set a carrier state. Which is recognized as a potential source of infection and a high risk factor for subsequent invasive infections. The prevalence of nasal carriage of this germ in disabled children in Paraguay is not known, thus contributing to the knowledge of their frequency and evaluate the profile of sensitivity to common antimicrobials was conducted this study, from May to July 2015.  Objective: to determine the prevalence of Staphylococcus aureus nasal carriage and profile of antimicrobial resistance in disabled children. Materials and Methods: A descriptive cross-sectional study in which 80 nasal swabs of children, who attended the service laboratory of SENADIS (Secretaria Nacional por los Derechos Humanos de las Personas con Discapacidad). The identification and sensitivity of germ was accomplished by conventional testing.  Results: 80 pediatric patients, 46 boys and 34 girls. 18 isolates of Staphylococcus aureus were obtained, corresponding to a prevalence of 22,5%. Susceptibility testing indicated that 14 strains were MSSA (Methicillin – Sensitive Staphylococcus aureus) and 4 RMSA ( Methicillin- resistant Staphylococcus aureus). Conclusion: The prevalence of Staphylococcus aureus in a population with its own characteristics provides valuable data for the epidemiology, reflecting the need for continued vigilance and take steps to reduce associated infections. The detection of RMAR evidences their progress; it is important to evaluate the empirical treatment to primary care.

scholarly journals Bacterial Etiology of Wound Exudates in Tertiary Care Cancer Patients and Antibiogram of the Isolates

2020 ◽  
Vol 13 ◽  
pp. 117863372095207
Author(s):  
Kiran Duwadi ◽  
Sujan Khadka ◽  
Sanjib Adhikari ◽  
Sanjeep Sapkota ◽  
Pabitra Shrestha
Keyword(s):  
Staphylococcus Aureus ◽  
Pathogenic Bacteria ◽  
Methicillin Resistance ◽  
Tertiary Care ◽  
Antibiotic Sensitivity ◽  
Cross Sectional Study ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Biochemical Tests ◽  
Cross Sectional

Introduction: Patients with malignancies frequently develop infections as a result of surgical procedures and fungating wounds leading to pus formation. This cross-sectional study was conducted to explore the bacteriological spectra of infections of various cancer sites and their antibiotic sensitivity patterns among the patients visiting minor operation theatre (OT) of B.P. Koirala Memorial Cancer Hospital (BPKMCH), Chitwan, Nepal. Methods: Over a period of 3 months from September to November 2018, a total of 183 wound exudates and pus samples were collected and analyzed by standard microbiological procedures. Isolates were identified based on the colony characters, Gram staining and an array of biochemical tests. Antibiotic susceptibility testing was performed by Kirby-Bauer disc diffusion technique according to criteria set by CLSI, 2016. Methicillin resistance in Staphylococcus aureus was tested with the help of cefoxitin using disc diffusion method. Results: Out of the 183 samples, 149 (81.4%) were culture positive. Among 13 different isolates identified, S. aureus (43.0%) was predominant followed by E. coli (14.0%). Higher incidence of bacteria was seen among the males (52.3%), in the age group 51 to 60 years (26.8%) and among the patients undergoing surgical intervention to deal with cancer (34.2%). The prevalence of wound infection was significantly affected by gender, age, and treatment regimen ( P < .01). Out of the total 68 S. aureus isolates, 38 (44.1%) were deemed as Methicillin-resistant Staphylococcus aureus (MRSA). Among the 158 isolates, 85 (53.8%) were multi-drug resistant (MDR). Cefepime was the most effective antibiotic for Gram positive isolates whereas both imipenem and meropenem were found to be equally more effective for Gram negative isolates. Conclusion: This study suggests that patients with malignancies harbor pathogenic bacteria; therefore, prudent use of antibiotics is essential to prevent the emergence of MDR pathogens.

scholarly journals The Prevalence, Risk Factors, and Bacterial Profile of Cesarean Surgical Site Infections at a University Teaching Hospital in South Western Uganda

2020 ◽  
Vol 5 (1) ◽  
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Post Partum ◽  
Positive Culture ◽  
Surgical Site Infections ◽  
Cross Sectional Study ◽  
University Teaching ◽  
Wound Sepsis ◽  
Cross Sectional ◽  
Antibiotics Use

Introduction: The single most important risk factor for post-partum maternal infection is Cesarean section (C/S) with a 5-20-fold greater risk for infection compared to a vaginal delivery. Post Cesarean wound infection is diagnosed in 2.5 to 16 percent of patients. Early wound infections (in the first 24 to 48 hours) are usually due to group A or B beta-hemolytic streptococcus and are characterized by high fever and cellulitis while later infections are likely due to Staphylococcus epidermises or aureus, Escherichia coli, or Proteus species. Objectives: To determine the prevalence, risk factors and bacterial profile of wound sepsis following Cesarean at Mbarara Regional Referral Hospital (MRRH). Methods: A cross sectional study of mothers who delivered by Cesarean at MRRH was conducted. Mothers were recruited consecutively until the sample size was achieved. The main dependent variable was wound sepsis confirmed by a positive culture for microorganisms. Results: Of the 359 mothers recruited in the study, 54 (15.5%) developed Cesarean wound sepsis. The risk factors associated with post Cesarean wound sepsis were severe anemia, lack of preoperative antibiotics use, poor antenatal attendance, mothers referred from peripheral health facilities, abnormal Body Mass Index (BMI), diabetes mellitus, more than five vaginal examinations, prolonged rupture of membranes before C/S, and prolonged labour. Staphylococcus aureus was isolated in 48.2% of all the septic cases and most of the bacterial isolates were susceptible to ceftriaxone, ceftazidime, ciprofloxacin and nalidixic acid and resistant to penicillin. Conclusion: The prevalence of post Cesarean wound sepsis is high with staphylococcus aureus being the most common bacteria isolated in infected wounds. Most of the bacteria were susceptible to third generation cephalosporins and quinolones. Antibiotics use was protective against developing wound sepsis.

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