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Epidemiology poster session 1: STI trends
P1-S1.04 The pattern of STI burden in the Central Region of Russia: chlamydiosis vs trichomoniasis. Which one is the leader?
  1. T Ivanova,
  2. N Anisimova,
  3. A Guschin,
  4. E Simonova
  1. Central Research Institute for Epidemiology, Moscow, Russian Federation


Background Infections caused by Chlamydia trachomatis (CT) are proved to lead to such dramatic complications as PID and infertility. That means that CT prevalence control is essential for arranging prophylactic actions. Official statistics claim trichomoniasis to be the most prevalent STI in Russia. For example, the amount of registered TV infections in 2009 was 1.8 times higher than the CT counts. Taking into consideration the absence of CT screening programs among general population along with the use of low sensitivity diagnostic tests (microscopy, DIF), it is reasonable to suppose that the real prevalence proportions are distinct from the official data. In this connection the aim of this study was to evaluate the STI prevalence pattern in a population sampling.

Methods This study included patients attending STD departments of outpatient clinics of Moscow region from 2004 to 2010. Total amount—190 975 patients. For the evaluation of the STIs prevalence correlation samples from these patients we tested simultaneously for CT, GC and TV by PCR.

Results In 2004 a total of 23 (0.86%) (95% CI 13 to 32) TV positive results were obtained; 158 (5.89%) (95% CI 133 to 182) CT positive; infection proportion was 1:6.8 (p=0.05). In 2010 a total of 577 (1.1%) (95% CI 522 to 622) TV positive results were obtained; 2886 (5.52%) (95% CI 2771 to 2980) CT positive; infection proportion was 1:5 (p=0.05). Annually this proportion did not vary dramatically and was no lower than 1:5 (p<0.05). No significant diversity in the rates of TV and GC detection was observed except for 2009, when 521 (1.22%) (95% CI 473 to 562) tested positively for TV; 364 (0.85%) (95% CI 323 to 396) for GC, infection proportion was 1:1.4 (p=0.05) see Abstract P1-S1.04 Figure 1.

Abstract P1-S1.04 Figure 1

Prevalence of Chlamydia trachomatis,Neisseria gonorrhoeae, Trichomonas vaginalis 2004–2010.

Conclusions This study shows that during the period 2004–2010 in a homogenous settings CT rates detected by sensitive methods were five or more times higher than TV rates. This might be an evidence of high CT prevalence and inappropriate official statistical recording of these infections in Russia.

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