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Social network investigation of a syphilis outbreak in Ottawa, Ontario.

D'Angelo-Scott H, Cutler J, Friedman D, Hendriks A, Jolly AM - Can J Infect Dis Med Microbiol (2015 Sep-Oct)

Bottom Line: Information regarding social venues where sex partners were met was plotted together with sexual partnerships, linking 18 cases and 40 contacts, representing 37% of the outbreak population and connecting many of the single individuals and dyads.Uncovering the places sex partners met was an effective proxy measure of high-risk activities shared with infected individuals and demonstrates the potential for focusing on interventions at one named bar and one Internet site to reach a high proportion of the population at risk.Abstract available from the publisher.

View Article: PubMed Central - PubMed

Affiliation: Canadian Field Epidemiology Program, Public Health Agency of Canada;

ABSTRACT

Background: The incidence of syphilis in Ottawa, Ontario, has risen substantially since 2000 to six cases per 100,000 in 2003, again to nine cases per 100,000 in 2007, and recently rose to 11 cases per 100,000 in 2010. The number of cases reported in the first quarter of 2010 was more than double that in the first quarter of 2009.

Objective: In May 2010, the Ontario Ministry of Health and Long Term Care requested the assistance of the Field Epidemiology Program to describe the increase in infectious syphilis rates and to identify social network sources and prevention messages.

Methods: Syphilis surveillance data were routinely collected from January 1, 2009 to July 15, 2010, and social networks were constructed from an enhanced social network questionnaire. Univariate comparisons between the enhanced surveillance group and the remaining cases from 2009 on non-normally distributed data were conducted using Kruskal-Wallis tests and χ(2) tests.

Results: The outbreak cases were comprised of 89% men. Seventeen of the 19 most recent cases consented to answer the questionnaire, which revealed infrequent use of condoms, multiple sex partners and sex with a same-sex partner. Information regarding social venues where sex partners were met was plotted together with sexual partnerships, linking 18 cases and 40 contacts, representing 37% of the outbreak population and connecting many of the single individuals and dyads.

Conclusion: Uncovering the places sex partners met was an effective proxy measure of high-risk activities shared with infected individuals and demonstrates the potential for focusing on interventions at one named bar and one Internet site to reach a high proportion of the population at risk.

No MeSH data available.


Related in: MedlinePlus

Reported infectious syphilis (primary, secondary and early latent cases only) rate per 100,000 population, males and females, Ottawa, Ontario, 2000 to 2009. Data source: Ontario Ministry of Health and Long-Term Care, integrated Public Health Information System, extracted December 23, 2014.
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f1-cjidmm-26-268: Reported infectious syphilis (primary, secondary and early latent cases only) rate per 100,000 population, males and females, Ottawa, Ontario, 2000 to 2009. Data source: Ontario Ministry of Health and Long-Term Care, integrated Public Health Information System, extracted December 23, 2014.

Mentions: Ottawa, Ontario, with a population of 812,000 in 2006 (4), experienced a five-fold increase in syphilis since 2001, mostly in men who have sex with men, and a further increase in 2009 (Figure 1). In May 2010, Ottawa Public Health (OPH) requested the assistance of the Canadian Field Epidemiology Program of the Public Health Agency of Canada, through the Ontario Ministry of Health and Long-Term Care. The objectives of the present investigation were to characterize the increase in reported infectious syphilis rates and to identify risk factors and social networks of cases indicative of transmission, which may then be used in interventions. In addition, we aimed to record patients’ views and reports regarding sexual-health messaging.


Social network investigation of a syphilis outbreak in Ottawa, Ontario.

D'Angelo-Scott H, Cutler J, Friedman D, Hendriks A, Jolly AM - Can J Infect Dis Med Microbiol (2015 Sep-Oct)

Reported infectious syphilis (primary, secondary and early latent cases only) rate per 100,000 population, males and females, Ottawa, Ontario, 2000 to 2009. Data source: Ontario Ministry of Health and Long-Term Care, integrated Public Health Information System, extracted December 23, 2014.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4644011&req=5

f1-cjidmm-26-268: Reported infectious syphilis (primary, secondary and early latent cases only) rate per 100,000 population, males and females, Ottawa, Ontario, 2000 to 2009. Data source: Ontario Ministry of Health and Long-Term Care, integrated Public Health Information System, extracted December 23, 2014.
Mentions: Ottawa, Ontario, with a population of 812,000 in 2006 (4), experienced a five-fold increase in syphilis since 2001, mostly in men who have sex with men, and a further increase in 2009 (Figure 1). In May 2010, Ottawa Public Health (OPH) requested the assistance of the Canadian Field Epidemiology Program of the Public Health Agency of Canada, through the Ontario Ministry of Health and Long-Term Care. The objectives of the present investigation were to characterize the increase in reported infectious syphilis rates and to identify risk factors and social networks of cases indicative of transmission, which may then be used in interventions. In addition, we aimed to record patients’ views and reports regarding sexual-health messaging.

Bottom Line: Information regarding social venues where sex partners were met was plotted together with sexual partnerships, linking 18 cases and 40 contacts, representing 37% of the outbreak population and connecting many of the single individuals and dyads.Uncovering the places sex partners met was an effective proxy measure of high-risk activities shared with infected individuals and demonstrates the potential for focusing on interventions at one named bar and one Internet site to reach a high proportion of the population at risk.Abstract available from the publisher.

View Article: PubMed Central - PubMed

Affiliation: Canadian Field Epidemiology Program, Public Health Agency of Canada;

ABSTRACT

Background: The incidence of syphilis in Ottawa, Ontario, has risen substantially since 2000 to six cases per 100,000 in 2003, again to nine cases per 100,000 in 2007, and recently rose to 11 cases per 100,000 in 2010. The number of cases reported in the first quarter of 2010 was more than double that in the first quarter of 2009.

Objective: In May 2010, the Ontario Ministry of Health and Long Term Care requested the assistance of the Field Epidemiology Program to describe the increase in infectious syphilis rates and to identify social network sources and prevention messages.

Methods: Syphilis surveillance data were routinely collected from January 1, 2009 to July 15, 2010, and social networks were constructed from an enhanced social network questionnaire. Univariate comparisons between the enhanced surveillance group and the remaining cases from 2009 on non-normally distributed data were conducted using Kruskal-Wallis tests and χ(2) tests.

Results: The outbreak cases were comprised of 89% men. Seventeen of the 19 most recent cases consented to answer the questionnaire, which revealed infrequent use of condoms, multiple sex partners and sex with a same-sex partner. Information regarding social venues where sex partners were met was plotted together with sexual partnerships, linking 18 cases and 40 contacts, representing 37% of the outbreak population and connecting many of the single individuals and dyads.

Conclusion: Uncovering the places sex partners met was an effective proxy measure of high-risk activities shared with infected individuals and demonstrates the potential for focusing on interventions at one named bar and one Internet site to reach a high proportion of the population at risk.

No MeSH data available.


Related in: MedlinePlus