Chlamydia trachomatis infections

Reporting Obligations

Individuals with suspect or confirmed cases must be reported to the Thunder Bay District Health Unit by the next working day by fax, phone or mail.

  • Fax: (807) 625-4822
  • Phone: 625-8318 or toll-free at 1-888-294-6630, ext. 8318
  • Mail: 999 Balmoral Street, Thunder Bay, ON P7B 6E7

 

Epidemiology

Aetiologic Agent:

Chlamydia trachomatis is an obligate intracellular bacterium causing genital infections and other forms of infections including chlamydial conjunctivitis and pneumonia.

Clinical Presentation:

Chlamydia infection is often asymptomatic including pharyngeal and rectal infections. If symptoms are present in rectal infections individuals often display rectal discharge and pain.

Males may present with urethral discharge, dysuria and frequency, non-specific urethral symptoms such as redness, itching, and swelling. More than 50% of infected males are asymptomatic.

Females may present with cervical infection that includes the following signs and symptoms: a mucopurulent endocervical discharge with edema, mucopurulent endocervical discharge with edema, dysuria, dyspareunia, erythema, and easily induced endocervical bleeding.

Complications and sequelae include salpingitis pelvic inflammatory disease with subsequent risk of infertility. Up to 70% of sexually active females with chlamydia infection are asymptomatic. Can present as chlamydial pneumonia and conjunctivitis (Ophthalmia neonatorum) in infants.

Modes of Transmission:

Sexual contact via oral, vaginal, cervical, urethral or anal routes; in children, exposure to infected genitals (consider the possibility of sexual abuse in these cases); newborns: during delivery from infected mother.

Incubation Period:

From time of exposure to onset of symptoms is 2-3 weeks, but can be as long as 6 weeks.

Period of Communicability:

Unknown; may extend for months or longer if untreated, especially in asymptomatic persons; re-infections are common; effective treatment ends infectivity.

 

Risk Factors/Susceptibility

Transmission is more efficient male-to-female than female-to-male. No acquired immunity has been demonstrated, although strain specific immunity probably exists. Risk factors include:

  • Sexual contact with a Chlamydia-infected person
  • A new sexual partner or more than two sexual partners in the past year • Previous sexually transmitted infections
  • Judgement impaired by alcohol/drugs
  • Vulnerable populations (e.g., injection drug users, incarcerated individuals, sex trade workers, street-involved youth, etc.)
  • The 15 to 24 year old age group

 

Diagnosis & Laboratory Testing

Chlamydia trachomatis detected in an appropriate clinical specimen (e.g., urogenital tract, rectal specimen). Refer to the “Canadian Guidelines on Sexually Transmitted Infections, evergreen edition” and “Chlamydia: Screening, Testing & Treatment algorithm.”

Testing Information & Requisition

 

Treatment & Case Management

Treatment is determined as per attending health care provider. Refer to the “Canadian Guidelines on Sexually Transmitted Infections, evergreen edition” and “Chlamydia: Screening, Testing & Treatment algorithm” for treatment information.

Provide education about and promote safer sex practices. Repeat testing is recommended 6 months post-treatment, as re-infection risk is high.

 

Patient Information

Patient Fact Sheet

 

Additional Resources

  1. Public Health Agency of Canada. “Canadian Guidelines on Sexually Transmitted Infections, evergreen edition.”

References

1. Ministry of Health and Long Term Care, Infectious Diseases Protocol, 2016.  Appendix A (2014) and Appendix B (2014)

Last Updated: 26/10/2017