Barbara Yaffe

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BACKGROUND Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) has increasingly been isolated from individuals with no predisposing risk factors; however, such strains have rarely been linked to outbreaks in the hospital setting. The present study describes the investigation of an outbreak of CA-MRSA that occurred in the(More)
OBJECTIVES To prospectively determine the rate of cytomegalovirus shedding in children and the rate of seroconversion to cytomegalovirus in providers at 38 infant-toddler day care centers in Toronto, Canada. METHODS Urine was collected for shell vial assay in 471 children between the ages of 3 and 42 months. Providers (n = 206) were tested for the(More)
BACKGROUND Toronto was the site of North America's largest outbreak of the severe acute respiratory syndrome (SARS). An understanding of the patterns of transmission and the effects on public health in relation to control measures that were taken will help health officials prepare for any future outbreaks. METHODS We analyzed SARS case, quarantine, and(More)
The outbreak of Severe Acute Respiratory Syndrome (SARS) was an international incident that was unprecedented in scale and scope. It led to the first declaration of a health emergency by the Province of Ontario and required the mobilization of public health staff, infectious disease specialists and infection control practitioners from across Toronto,(More)
BACKGROUND Cutaneous atypical mycobacterial infections have been increasingly described in association with cosmetic and alternative procedures. OBJECTIVE We report an outbreak of acupuncture-associated mycobacteriosis. Between April and December 2002, 32 patients developed cutaneous mycobacteriosis after visiting an acupuncture practice in Toronto,(More)
OBJECTIVE To describe infection control practices used by technicians doing manicures and pedicures in an urban setting in Ontario. METHODS A random sample of 120 establishments was selected from a sampling frame. A survey was designed and administered to technicians through face-to-face interviews. RESULTS Technicians in 72 establishments were(More)
Congenital tuberculosis is uncommon, and nosocomial transmission from a congenitally infected infant to another infant has not been reported in the English literature. We report an investigation of 2 infants with tuberculosis who were cared for in the same neonatal intensive care unit. Isolates from both infants were genetically indistinguishable.(More)
To prevent the spread of tuberculosis (TB) and limit the development of drug-resistant strains, the World Health Organization and the Canadian TB Standards recommend Directly Observed Therapy (DOT) for TB patients.1,2 In Toronto, DOT is conducted by Toronto Public Health (TPH) staff who visit patients with active TB 3 to 7 days/week over the course of their(More)
Late recognition of severe acute respiratory syndrome (SARS) was associated with no known SARS contact, hospitalization before the nosocomial outbreak was recognized, symptom onset while hospitalized, wards with SARS clusters, and postoperative status. SARS is difficult to recognize in hospitalized patients with a variety of underlying conditions in the(More)
Hypothetical clinical cases were used to investigate surgical decision-making in relation to surgical rates across Ontario. Six procedures were studied (cholecystectomy, colectomy, inguinal herniorrhaphy, hysterectomy, cesarean section and tonsillectomy-adenoidectomy), and substantial differences of opinion regarding the choice of surgical or nonsurgical(More)