Publications

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maternal and neonatal colonization with group b streptococci in ottawa. 1979376085
population structure and antimicrobial resistance of invasive serotype iv group b streptococcus, toronto, ontario, canada.we recently showed that 37/600 (6.2%) invasive infections with group b streptococcus (gbs) in toronto, ontario, canada, were caused by serotype iv strains. we report a relatively high level of genetic diversity in 37 invasive strains of this emerging gbs serotype. multilocus sequence typing identified 6 sequence types (sts) that belonged to 3 clonal complexes. most isolates were st-459 (19/37, 51%) and st-452 (11/37, 30%), but we also identified st-291, st-3, st-196, and a novel st-682. we detec ...201525811284
opportunities for prevention of perinatal group b streptococcal disease: a multistate surveillance analysis. the neonatal group b streptococcal disease study group.to evaluate the potential impact of acog and centers for disease control and prevention (cdc) consensus strategies for the prevention of perinatal group b streptococcal disease.19979397099
neonatal group b streptococcal disease: incidence, presentation, and mortality.to ascertain the incidence, and compare the clinical characteristics, laboratory parameters, and immediate mortality of neonates with early-onset (symptomatic and asymptomatic) and late-onset group b streptococcal (gbs) disease.200818175244
prevalence and mechanisms of macrolide resistance in invasive and noninvasive group b streptococcus isolates from ontario, canada.macrolide resistance has been demonstrated in group b streptococcus (gbs), but there is limited information regarding mechanisms of resistance and their prevalence. we determined these in gbs obtained from neonatal blood cultures and vaginal swabs from pregnant women. of 178 isolates from cases of neonatal gbs sepsis collected from 1995 to 1998, 8 and 4.5% were resistant to erythromycin and clindamycin, respectively, and one isolate showed intermediate penicillin resistance (mic, 0.25 microg/ml) ...200111709331
group b streptococcal necrotizing fasciitis and streptococcal toxic shock-like syndrome in adults.necrotizing fasciitis, which is a severe and uncommon infection involving the subcutaneous tissues, is usually caused by group a streptococci. to our knowledge, however, group b streptococci (streptococcus agalactiae) have been reported to cause necrotizing fasciitis in only 4 instances (2 involving neonates) over the past 4 decades. we report 3 cases of group b streptococcal necrotizing fasciitis in adults that occurred in southern ontario and quebec within a 10-month period. all 3 patients had ...19989701105
physicians' prevention practices and incidence of neonatal group b streptococcal disease in 2 canadian regions.the impact of expert guidelines on the prevention of neonatal group b streptococcal (gbs) disease has not been studied in canada. our aim was to determine physician practices with regard to this condition before and after publication of canadian guidelines and to monitor concurrent trends in the incidence of neonatal gbs disease.200111233867
clinical mastitis in dairy cattle in ontario: frequency of occurrence and bacteriological isolates.the objective of this study was to describe the frequency of occurrence of clinical mastitis in dairy herds in ontario. the study group consisted of 65 dairy farms involved in a 2-year observational study, which included recording all clinical mastitis cases and milk sampling of quarters with clinical mastitis. lactational incidence risks of 9.8% for abnormal milk only, 8.2% for abnormal milk with a hard or swollen udder, and 4.4% for abnormal milk plus systemic signs of illness related to masti ...19989442950
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