Prevalence of Staphylococcus aureus introduced into intensive care units of a University Hospital.

نویسندگان

  • Silvana M M Cavalcanti
  • Emmanuel R de França
  • Carlos Cabral
  • Marinalda A Vilela
  • Francisco Montenegro
  • Daniela Menezes
  • Angela C R Medeiros
چکیده

Staphylococcus aureus is one of the principal human pathogens that colonize healthy individuals in the community in general, and it is responsible for severe infections in hospitalized patients. Due to an increase in the prevalence of strains of methicillin-resistant S. aureus (MRSA), combating these microorganisms has become increasingly difficult. A descriptive study was carried out on 231 patients in intensive care at the Oswaldo Cruz University Hospital (HUOC) in Recife, Brazil between January and April 2003 to determine the prevalence of S. aureus and MRSA and to evaluate risk factors for colonization by these bacteria when introduced into Intensive Care Units (ICUs). Body secretions were collected from the nostrils, axillary and perineal regions, and from broken skin lesions, of all patients during the first 48 hours following admission to the ICU. Samples were inoculated into blood agar and mannitol-salt-agar culture medium and identified by Gram staining, and by coagulase, DNAse and agglutination (Slidex Staph Test) tests. Growth in Mueller-Hinton agar with 4% sodium chloride and 6 mg/L oxacillin was used to identify MRSA. In addition, the latex agglutination test was performed to identify penicillin-binding protein, PBP 2A. The prevalence of S. aureus and MRSA was 87/231 (37.7%) and 30/231 (12.98%), respectively. There was no association between any risk factor studied (age, sex, origin of the patient--whether hospital or community, previous hospitalization, use of current or previous antibiotic therapy, corticotherapy and/or immunotherapy, reason for hospitalization and place of hospitalization) and the presence of S. aureus. However, a significant association was established between previous hospitalization and the presence of MRSA (RR:1.85; CI:1.00-3.41; p=0.041). The nostrils were the principal site of colonization by both S. aureus (80.4%) and MRSA (26.4%), followed by the perineal area, with rates of 27.6% and 12.6%, respectively. If only the nostrils had been investigated, the study would have failed to diagnose 17 patients (19.5%) as carriers of the pathogen into the ICU, thus contributing towards cross-dissemination.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Efficacy of Mupirocin Ointment in Eradication of Staphylococcus aureus Nasal Carriage in Intensive Care Unit Staff and Patients

ABSTRACT           Background and Objectives: Staphylococcus aureus is one of the most common causes of morbidity and mortality among intensive care unit (ICU) patients. Nasal carriage is one of the main routs of S. aureus transmission between hospital personnel and patients. The objective of this study was to evaluate the efficacy of mupirocin oi...

متن کامل

Prevalence of hospital-acquired infections in intensive care units in public hospitals in Tehran, Iran, in 2012-2014

Infection control and hospital-acquired infection (HAI) prevalence have recently attracted much attention especially in developing countries. The aim of this study was to estimate the prevalence of HAI in public hospitals in Tehran, Iran, more specifically, to determine the epidemiological status of nosocomial infections in intensive care units (ICUs) of 3 public hospitals. The study was conduc...

متن کامل

Study of nosocomial isolates of Staphylococcus aureus with special reference to methicillin resistant S. aureus in a tertiary care hospital in Nepal.

To find out the prevalence of Staphylococcus aureus nosocomial infection and methicillin resistant S. aureus (MRSA), clinical samples from nosocomially infected patients were processed by following standard methodology in microbiology laboratory, Tribhuvan University Teaching Hospital, Kathmandu, Nepal. Of 149 S. aureus isolates, skin infection isolates contributed a major part 72.5% making nos...

متن کامل

Evaluation of Antibiotic Susceptibility Pattern of Staphylococcus Aureus in Clinical Specimens of Patients Admitted to Ayatollah Mousavi Hospital in Zanjan Using Disk Diffusion, E.test and D-test Methods

Introduction: Staphylococcus aureus is an important cause of severe infections in hospital and community and can cause significant mortality and morbidity in patients. In this study, the susceptibility and resistance pattern of Staphylococcus aureus to common antibiotics was investigated by disk diffusion, MIC (Minimal-inhibitory concentration) determination with E-test and D-test Methods: This...

متن کامل

Methicillin Resistant Staphylococcus Aureus in Ventilator Associated ‎Pneumonia in Toxicological Intensive Care Unit

Background: Methicillin resistant Staphylococus Aureus (MRSA) is a cause of ‎nosocomial infections at intensive care unit (ICU), which imposes a high mortality and ‎morbidity on the health care systems.‎ The objective of this study was to evaluate the role of MRSA in patients with clinically ‎suspected ventilator associated pneumonia (VAP) in toxicological ICU admitted ‎patients.Methods: This ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases

دوره 9 1  شماره 

صفحات  -

تاریخ انتشار 2005