Eric P.F. Chow

Dr. Eric P.F. Chow

orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 August 2019 in The Lancet
Verified
Journal Article
Open access
MDMélanie Drolet
Mélanie Drolet
ÉBÉlodie Bénard
Élodie Bénard
NPNorma Pérez
Norma Pérez
MBMarc Brisson
Marc Brisson
HAHammad Ali
Hammad Ali
BYBo Nancy Yu
Bo Nancy Yu
More than 10 years have elapsed since human papillomavirus (HPV) vaccination was implemented. We did a systematic review and meta-analysis of the population-level impact of vaccinating girls and women against human papillomavirus on HPV infections, anogenital wart diagnoses, and cervical intraepithelial neoplasia grade 2+ (CIN2+) to summarise the most recent evidence about the effectiveness of HPV vaccines in real-world settings and to quantify the impact of multiple age-cohort vaccination. In this updated systematic review and meta-analysis, we used the same search strategy as in our previous paper. We searched MEDLINE and Embase for studies published between Feb 1, 2014, and Oct 11, 2018. Studies were eligible if they compared the frequency (prevalence or incidence) of at least one HPV-related endpoint (genital HPV infections, anogenital wart diagnoses, or histologically confirmed CIN2+) between pre-vaccination and post-vaccination periods among the general population and if they used the same population sources and recruitment methods before and after vaccination. Our primary assessment was the relative risk (RR) comparing the frequency (prevalence or incidence) of HPV-related endpoints between the pre-vaccination and post-vaccination periods. We stratified all analyses by sex, age, and years since introduction of HPV vaccination. We used random-effects models to estimate pooled relative risks. We identified 1702 potentially eligible articles for this systematic review and meta-analysis, and included 65 articles in 14 high-income countries: 23 for HPV infection, 29 for anogenital warts, and 13 for CIN2+. After 5-8 years of vaccination, the prevalence of HPV 16 and 18 decreased significantly by 83% (RR 0·17, 95% CI 0·11-0·25) among girls aged 13-19 years, and decreased significantly by 66% (RR 0·34, 95% CI 0·23-0·49) among women aged 20-24 years. The prevalence of HPV 31, 33, and 45 decreased significantly by 54% (RR 0·46, 95% CI 0·33-0·66) among girls aged 13-19 years. Anogenital wart diagnoses decreased significantly by 67% (RR 0·33, 95% CI 0·24-0·46) among girls aged 15-19 years, decreased significantly by 54% (RR 0·46, 95% CI 0.36-0.60) among women aged 20-24 years, and decreased significantly by 31% (RR 0·69, 95% CI 0·53-0·89) among women aged 25-29 years. Among boys aged 15-19 years anogenital wart diagnoses decreased significantly by 48% (RR 0·52, 95% CI 0·37-0·75) and among men aged 20-24 years they decreased significantly by 32% (RR 0·68, 95% CI 0·47-0·98). After 5-9 years of vaccination, CIN2+ decreased significantly by 51% (RR 0·49, 95% CI 0·42-0·58) among screened girls aged 15-19 years and decreased significantly by 31% (RR 0·69, 95% CI 0·57-0·84) among women aged 20-24 years. This updated systematic review and meta-analysis includes data from 60 million individuals and up to 8 years of post-vaccination follow-up. Our results show compelling evidence of the substantial impact of HPV vaccination programmes on HPV infections and CIN2+ among girls and women, and on anogenital warts diagnoses among girls, women, boys, and men. Additionally, programmes with multi-cohort vaccination and high vaccination coverage had a greater direct impact and herd effects. WHO, Canadian Institutes of Health Research, Fonds de recherche du Québec - Santé.

1 November 2013 in The Lancet Infectious Diseases
Verified
Journal Article
Closed access
LZLei Zhang
Lei Zhang
ECEric P.F. Chow
Eric P.F. Chow
JJJun Jing
Jun Jing
XZXun Zhuang
Xun Zhuang
XLXiaoshan Li
Xiaoshan Li
DWDavid P Wilson
David P Wilson

1 November 2020 in The Lancet Infectious Diseases
Verified
Journal Article
Closed access
DMDorothy A Machalek
Dorothy A Machalek
YTYusha Tao
Yusha Tao
HSHannah Shilling
Hannah Shilling
JJJørgen S Jensen
Jørgen S Jensen
MUMagnus Unemo
Magnus Unemo
CBCatriona S Bradshaw
Catriona S Bradshaw

5 June 2018 in Clinical Infectious Diseases
Verified
Journal Article
Open access
PDF file
TRTim R H Read
Tim R H Read
CFChristopher K Fairley
Christopher K Fairley
GMGerald L Murray
Gerald L Murray
JJJorgen S Jensen
Jorgen S Jensen
JDJennifer Danielewski
Jennifer Danielewski
CBCatriona S Bradshaw
Catriona S Bradshaw
Rising macrolide and quinolone resistance in Mycoplasma genitalium necessitate new treatment approaches. We evaluated outcomes of sequential antimicrobial therapy for M. genitalium guided by a macrolide-resistance assay. In mid-2016, Melbourne Sexual Health Centre switched from azithromycin to doxycycline (100 mg twice daily for 7 days) for nongonococcal urethritis, cervicitis, and proctitis. Cases were tested for M. genitalium and macrolide-resistance mutations (MRMs) by polymerase chain reaction. Directly after doxycycline, MRM-negative infections received 2.5 g azithromycin (1 g, then 500 mg daily for 3 days), and MRM-positive infections received sitafloxacin (100 mg twice daily for 7 days). Assessment of test of cure and reinfection risk occurred 14–90 days after the second antibiotic. Of 244 evaluable M. genitalium infections (52 women, 68 heterosexual men, 124 men who have sex with men) diagnosed from 20 June 2016 to 15 May 2017, MRMs were detected in 167 (68.4% [95% confidence interval {CI}, 62.2%–74.2%]). Treatment with doxycycline decreased bacterial load by a mean 2.60 log10 (n = 56; P < .0001). Microbiologic cure occurred in 73 of 77 MRM-negative infections (94.8% [95% CI, 87.2%–98.6%]) and in 154 of 167 MRM-positive infections (92.2% [95% CI, 87.1%–95.8%]). Selection of macrolide resistance occurred in only 2 of 76 (2.6% [95% CI, .3%–9.2%]) macrolide-susceptible infections. In the context of high levels of antimicrobial resistance, switching from azithromycin to doxycycline for presumptive treatment of M. genitalium, followed by resistance-guided therapy, cured ≥92% of infections, with infrequent selection of macrolide resistance.

1 June 2019 in The Lancet HIV
Verified
Journal Article
Closed access
ECEric P.F. Chow
Eric P.F. Chow
AGAndrew E Grulich
Andrew E Grulich
CFChristopher K Fairley
Christopher K Fairley

6 March 2025 in New England Journal of Medicine
Verified
Journal Article
Closed access
LVLenka A. Vodstrcil
Lenka A. Vodstrcil
EPErica L. Plummer
Erica L. Plummer
CFChristopher K. Fairley
Christopher K. Fairley
JHJane S. Hocking
Jane S. Hocking
MLMatthew G. Law
Matthew G. Law
CBCatriona S. Bradshaw
Catriona S. Bradshaw
Bacterial vaginosis affects one third of reproductive-aged women, and recurrence is common. Evidence of sexual exchange of bacterial vaginosis-associated organisms between partners suggests that male-partner treatment may increase the likelihood of cure. This open-label, randomized, controlled trial involved couples in which a woman had bacterial vaginosis and was in a monogamous relationship with a male partner. In the partner-treatment group, the woman received first-line recommended antimicrobial agents and the male partner received oral and topical antimicrobial treatment (metronidazole 400-mg tablets and 2% clindamycin cream applied to penile skin, both twice daily for 7 days). In the control group, the woman received first-line treatment and the male partner received no treatment (standard care). The primary outcome was recurrence of bacterial vaginosis within 12 weeks. A total of 81 couples were assigned to the partner-treatment group, and 83 couples were assigned to the control group. The trial was stopped by the data and safety monitoring board after 150 couples had completed the 12-week follow-up period because treatment of the woman only was inferior to treatment of both the woman and her male partner. In the modified intention-to-treat population, recurrence occurred in 24 of 69 women (35%) in the partner-treatment group (recurrence rate, 1.6 per person-year; 95% confidence interval [CI], 1.1 to 2.4) and in 43 of 68 women (63%) in the control group (recurrence rate, 4.2 per person-year; 95% CI, 3.2 to 5.7), which corresponded to an absolute risk difference of -2.6 recurrences per person-year (95% CI, -4.0 to -1.2; P<0.001). Adverse events in treated men included nausea, headache, and metallic taste. The addition of combined oral and topical antimicrobial therapy for male partners to treatment of women for bacterial vaginosis resulted in a lower rate of recurrence of bacterial vaginosis within 12 weeks than standard care. (Funded by the National Health and Medical Research Council of Australia; StepUp Australian New Zealand Clinical Trials Registry number, ACTRN12619000196145.).