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What is the definition of PID?
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- an infection in the upper genital tract not associated with pregnancy or intraperitoneal pelvic operations.
- may include infection of the endometrium (endometritis), the oviducts (salpingitis), the ovary (oophoritis), the uterine wall (myometritis), the uterine serosa and broad ligaments (parametritis), and the pelvic peritoneum.
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What is the incidence of PID?
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-occurs in 1-2% of young sexually active women
-85% of these are spontaneous and the rest occur due to breakdown of the cervical mucus barrier due to procedures such as endometrial biopsies, IUD placement, hystereoscopy etc.
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What are the major long term sequelae associated with PID?
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1. Infertility due to tubal obstruction
2. Ectopic pregnancy - incidence increases 6 to 10 fold
3. chronic pelvic pain - increases by 4 fold
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What is the cause of PID?
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- a polymicrobial infection caused by organisms ascending from the vagina and cervix along the mucosa of the endometrium to infect the mucosa of the oviduct.
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In what % of the cases do GC and Chlamydia co-exist?
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25-50%
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1. What percentage of women with N gonorrhea cervicitis eventually develop PID?
2. What percentage of women with Chlamydia cervicitis eventually develop PID?
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1. 15%
2. 30%
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What percentage of women with endocervical cultures positive for N. gonorrhoeae at the time of acute PID will have the same organism cultured from the fallopian tubes?
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50%
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Do all N. gonorrhoeae cause PID?
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- NO. it depends on the virulence of the strain or colony type.
- Transparent colonies of N. gonorrhoeae on culture medium attach more readily to epithelial cells and thus produce tubal infection more frequently than opaque-appearing colonies
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What causes scarring of tubes after PID?
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- acute complement-mediated inflammatory response with migration of polymorphonuclear leukocytes, vasodilation, and transudation of plasma into the tissues occurs during a PID infection.
- This robust inflammatory response causes cell death of the ciliated epithelial cells and tissue damage.
- The process of repair with removal of dead cells and fibroblast presence results in scarring and tubal adhesions.
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1. How long does N gonorrhoeae remain in the fallopian tubes in untreated patients?
2. How long does N gonorrhoeae remain in the fallopian tubes in untreated patients?
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1. Few days
2. Few months
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What is the mechanism of action of chlamydia in causing tubal destruction?
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- chlamydial 57-kDa protein and human 60-kDa heat shock protein have homologous region.
- thus repeat exposures to Chlamydia may lead to a hypersentivity reaction causing severe tubal damage even if C. trachomatis is no longer present.
- Immunologically sensitized studies have demonstrated that women with antibodies to chlamydial heat shock protein are more likely to have severe tubal scarring and Fitz-Hugh-Curtis syndrome (adhesions between the liver and diaphragm indicating prior peritonitis) than women who do not mount this antibody response
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What is silent PID?
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- a form of atypical PId
- asymptomatic, inflammation of the upper genital tract
- often associated with chlamydial infection
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What are the organisms associated with PID?
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1. Sexually transmitted - GC, Chlamydia - usually positive during the beginning week of the infection
2. The most common aerobic organisms are nonhemolytic Streptococcus, Escherichia coli, GBS, and coagulase-negative Staphylococcus.
3. Anaerobic - predominate over aerobes. most common are Bacteroides, Peptostreptococcus, and Peptococcus. almost ubiquitous in pelvic abscesses associated with acute PID
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What increases the chance of developing tubo-ovarian complexes or abscesses?
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Concurrent bacterial vaginosis or HIV infection.
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What are the risk factors for developing PID?
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1. younger age at first intercourse
2. older sex partners
3. involvement with a child protective agency
4. prior suicide attempt
5. alcohol use before intercourse, and
6. current C. trachomatis infection
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