Women’s Health

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Pelvic Inflammatory Disease (PID)

PID is an infection of the upper genital tract in women. It includes endometritis, salpingitis, tubo-ovarian abscess, and pelvic peritonitis. It is usually polymicrobial and can be caused by a range of sexually and non-sexually transmitted organisms.

If patient is septic give antibiotics within 1 hour or presentation.

Antimicrobial

For patients in whom oral therapy is appropriate (see comments) use:

Amoxicillin 500mg PO TID

PLUS

Metronidazole 500mg PO BID

PLUS

STI pack (Cefixime 400mg PO and Azithromycin 1g PO) single dose

For patients in whom IV therapy is indicated (see comments) use:

Ceftriaxone 2g IV OD

PLUS

Metronidazole 500mg IV BID

PLUS

Azithromycin 1g PO single dose (if septic use 500mg IV OD)

If patient is in septic shock ADD:

Amikacin 28mg/kg IV OD as a first dose in patients with creatinine clearance >60ml/minute. Use 16-20mg/kg if creatinine clearance <60ml/minute. For subsequent doses see Aminoglycoside dosing section.

If amikacin is not available and patient is likely to have normal renal function give Gentamicin 7mg/kg IV single dose. If renal function is likely to be abnormal give Gentamicin 4-5mg/kg.

Change to oral antibiotics when improving according to susceptibility results. If susceptibility results are not available use:

Amoxicillin 500mg PO TID

PLUS

Metronidazole 500mg PO BID

Comments and Duration of Therapy 

Send first pass urine for PCR, swab vagina with bacterial swab for culture, and with viral (dry) swab for PCR. If systemically unwell send blood cultures prior to antibiotics.

Patients with any of the following should receive IV therapy:

  • Pregnancy
  • Inability to tolerate oral therapy
  • Severe pain
  • Fever ≥ 38 degrees
  • Systemic features
  • Sepsis
  • Suspicion of tubo-ovarian abscess

Duration:

If using IV therapy change to oral antibiotics when clinically improving. Use single doses only of azithromycin and cefixime. Treat for total of 14 days.

If a sexually transmitted pathogen is detected, see Chapter 8: Genital In- fections.

 

Post-partum endometritis

This is an infection of the endometrium following pregnancy, it may extend into the myometrium, parametrium and progress beyond the uterus. It is usually polymicrobial. Patients typically present with fever, pelvic pain, and uterine tenderness, most often in the first week post-partum. Rarely Clostridium, Streptococcus pyogenes and Staphylococcus aureus can lead to endometritis with toxic shock syndrome and/or necrotising soft tissue infection. Endometritis occurring more than a week post-partum suggests Chlamydia trachomatis infection.

Antimicrobial 

Mild:

Amoxicillin/Clavulanic acid 500/125mg PO TID

Alternative:

Co-trimoxazole 160 / 800mg PO BID

PLUS

Metronidazole 500mg PO BID

Severe:

Ampicillin 2g IV QID

PLUS

Gentamicin 4-5mg/kg IV OD

PLUS

Metronidazole 500mg IV BID

If patient is in septic shock replace Gentamicin with:

Amikacin 28mg/kg IV OD as a first dose in patients with creatinine clearance >60ml/minute. Use 16-20mg/kg if creatinine clearance <60ml/minute. For subsequent doses see Aminoglycoside dosing section.

If amikacin is not available and patient is likely to have normal renal function give above regime but increase Gentamicin to 7mg/kg IV for first dose.

Do not continue gentamicin or amikacin beyond 72 hours.

Comments and Duration of Therapy

If patient is septic give antibiotics within 1 hour or presentation.

Send blood cultures if systemically unwell. Send first pass urine for PCR, swab vagina with bacterial swab for culture, and with viral (dry) swab for PCR.

Duration:

Mild: Treat for 7 days
Severe: Continue IV antibiotics until afebrile for 24-48 hours and clinically improved, then stop.

If a sexually transmitted pathogen is detected, see Chapter 8: Genital Infections.

 

Intra-amniotic infection/ chorioamnionitis

Infection involving the amniotic fluid, placenta, foetus, foetal membranes or decidua. Most infections are polymicrobial. Patients present with fever, uterine tenderness, and purulent amniotic fluid.

Antimicrobial 

Ampicillin 2g IV QID

PLUS

Gentamicin 4-5mg/kg

If patient is in septic shock replace Gentamicin with:

Amikacin 28mg/kg IV OD as a first dose in patients with creatinine clearance >60ml/minute. Use 16-20mg/kg if creatinine clearance <60ml/minute. For subsequent doses see Aminoglycoside dosing section.

If amikacin is not available and patient is likely to have normal renal function give above regime but increase Gentamicin to 7mg/kg IV for first dose

Do not continue gentamicin or amikacin beyond 72 hours.

If patient has caesarian use usual prophylaxis in addition to antibiotics for chorioamnionitis. After caesarian delivery and cord clamping ADD:

Metronidazole 500mg IV single dose

Comments and Duration of Therapy 

If patient is septic give antibiotics within 1 hour of presentation.

Send blood cultures if septic. Consider sending amniotic fluid for microscopy and culture.

Duration:

After vaginal delivery unless patient is septic stop antibiotics. After caesarian section give one further dose of each antibiotic then stop.

If patient develops fevers post-delivery treat as post-partum endometritis.

Septic abortion

Treat as Post-partum endometritis

Bartholin’s abscess

Bartholin glands are deep to the posterior aspect of the labia majora, and usually produce mucous for vaginal and vulval lubrication. Blockage of these ducts causes cysts which can sometimes become secondarily infected resulting in an abscess. Pathogens include Staphylococcus aureus, Streptococcal spp., and E. coli.

Antimicrobial 

Unless there is significant erythema following drainage, antibiotics are not required.

If infection persists following drainage use:

Amoxicillin/Clavulanic acid 500/125mg (child 25/6.25 mg/kg) PO TID

Alternative:

Cotrimoxazole 160/800 mg (child 4/20 mg/kg) PO BID

Comments and Duration of Therapy 

The mainstay of treatment is surgical drainage. If recurrent or complicated infection send pus for culture.

Duration:

Treat for 7 days

Vulvovaginal candidiasis

Commonly presents with vaginal or vulval pruritus or burning. The mucosa may have a white discharge with plaques on an erythematous base. Discharge is generally not malodorous. Incidence of vulvovaginal candidiasis increases during pregnancy, particularly in the third trimester. Candida can occasionally cause balanitis, especially in diabetic patients, and in partners of women with recurrent vaginal candidiasis.

Antimicrobial

Clotrimazole pessary 500mg PV single dose

Alternative:

Clotrimazole 1% cream PV OD

OR

Nystatin 100 000 units PV OD

If topical therapy is not tolerated and patient is not pregnant use:

Fluconazole 150mg PO single dose

Comments and Duration of Therapy

Perform microscopy on wet mount of vaginal discharge and measure pH. In candidiasis vaginal pH is typically normal (4-4.5).

If there is any doubt regarding the diagnosis, or if patient has recurrent or resistant symptoms, take a swab of the affected area for microscopy and culture, prior to antifungal therapy.

Treatment failure is most commonly due to misdiagnosis.

Duration:

Clotrimazole pessary: Give single dose

Clotrimazole 1% cream: Treat for 6 nights.

Nystatin: Treat for 14 nights.

Fluconazole: Give single dose.

See Oral thrush (Candidiasis) in Chapter 9: Gastrointestinal infections, Neonatal oral candidiasis (thrush) in Chapter 11: Paediatric Infections (Neonates, Infants and Children), and Cutaneous Candidiasis in Chapter 13: Skin and Soft Tissue Infection

Bacterial vaginosis (BV)

Lactobacilli are a major component of normal vaginal flora and produce hydrogen to maintain an acidic pH, limiting anaerobe growth. BV is a process that reflects a change in typical vaginal microbiota. Women may present with a grey or off-white, fishy-smelling discharge. Pruritis or burning are generally absent. On physical examination a milky, homogenous coating may be seen adherent to the vaginal wall.

Male partners of women with bacterial vaginosis may be colonized with organisms associated with BV (e.g. Gardnerella vaginalis), however they are generally asymptomatic.

Antimicrobial 

Metronidazole 2g PO single dose

Alternative:

Metronidazole 500mg PO BID

OR

Clindamycin (preferred in pregnancy) 300mg PO BID

Treatment of male sexual partners is not currently recommended.

Comments and Duration of Therapy 

Perform microscopy on wet mount of vaginal discharge to look for clue cells. Measure pH: in BV this is >4.5. Perform whiff-amine test; this is positive if a fishy odor is produced upon adding 10% KOH to vaginal discharge.

Send vaginal swab to laboratory for microscopy; culture is unnecessary in BV.

BV is a risk factor for preterm delivery, HIV acquisition and transmission, and other STI acquisition. It is associated with pelvic inflammatory disease. Test all women with BV for other sexually transmitted infections including HIV and syphilis. See Chapter 8: Genital Infections

Duration:

Metronidazole 2g: Give single dose

Metronidazole 500mg and Clindamycin: Treat for 7 days

Gynaecological surgery (hysterectomy, gynaecological-oncology procedures, pelvic organ prolapse) prophylaxis

Antimicrobial 

Cefazolin 2g IV

PLUS

Metronidazole 500mg IV

Alternative:

Clindamycin 600mg + Gentamicin 2mg/kg

OR

Cloxacillin 2g + Gentamicin 2mg/kg + Metronidazole 500mg

Comments and Duration of Therapy 

Duration:

Stop antibiotics after procedure. Do not continue prophylaxis beyond 24 hours.

If infection is present see Pelvic Inflammatory Disease (PID) in Chapter 17: Women’s Health, and Post-partum Endometritis in Chapter 17: Women’s Health.

If surgical wound infection is present, see Surgical Site Infection in Chapter 13: Skin and Soft Tissue Infections.

Caesarean Delivery Prophylaxis

Antimicrobial 

Cefazolin 2 g IV

Alternative:

Cloxacillin 2g IV

OR

Clindamycin 600mg IV

OR

Vancomycin 15mg/kg

Comments and Duration of Therapy 

Duration:

Stop antibiotics after procedure. Do not continue prophylaxis beyond 24 hours.

If surgical wound infection is present, see Surgical Site Infection in Chapter 13: Skin and Soft Tissue Infections.

Anal sphincter laceration prophylaxis

Antimicrobial

Initial treatment:

Cefazolin 2g IV

PLUS

Metronidazole 500mg IV

Alternative:

Clindamycin 600mg IV

Followed by:

Amoxicillin/Clavulanic acid 500/125mg PO TID

Alternative:

Co-trimoxazole 800/160mg PO BID

PLUS

Metronidazole 500mg PO BID

Comments and Duration of Therapy 

Duration:

Give single dose of initial IV treatment, then 5 days of oral antibiotics.

Neonatal Group B Streptococcus infection prophylaxis

Prophylaxis is indicated if any of the following:

  • Prior invasive group B streptococcal disease in neonate
  • Known group B colonisation in current pregnancy
  • Intrapartum fever (38C)
  • Preterm onset of labour (<37 weeks gestation)
  • Prolonged rupture of membranes (≥18hours)

Antimicrobial 

Cefazolin 2g TID IV

Alternative:

Ampicillin 2g QID IV

OR

Benzylpenicillin 5 million IU (3g) IV for one dose, followed by 3 million IU (1.8g) Q4H IV until delivery

OR

Clindamycin 600mg TID IV

Comments and Duration of Therapy 

Consider screening for Group B Streptococcal colonization with vaginal swab 3-5 weeks prior to expected delivery.

Duration:

Begin 4 hours prior to expected delivery and stop at time of delivery.

Premature rupture of membranes (PROM)

The diagnosis is made by obtaining a history of leaking vaginal fluid, pooling on speculum examination, and positive nitrazine and fern tests, prior to onset of labour.

Antimicrobial 

Only give antibiotics if gestation is <34 weeks.

Azithromycin 1g IV / PO once only

PLUS

Ampicillin 2g QID for 48 hours

Followed by:

Amoxicillin 500mg TID PO

Comments and Duration of Therapy

Prolonged PROM has been associated with increased risk of chorioamnionitis, abruption, and cord prolapse, however maintaining the pregnancy to gain further foetal maturity may be beneficial.

34 weeks or more: Plan delivery. Labour induction unless contraindication, GBS prophylaxis, single corticosteroid course may be considered up to 36 weeks.

32-33 complete weeks: Expectant management. GBS prophylaxis, single corticosteroid course, antimicrobial to prolong latency

24-31 complete weeks: Expectant management. GBS prophylaxis, single corticosteroid course, antimicrobial to prolong latency, consider tocolytics, MgSO4 for neuroprotection may be considered

Duration:

Stop antibiotics after 7 days or delivery whichever is sooner.

Normal vaginal delivery

There is no need for antibiotic prophylaxis for normal vaginal delivery if patient has no risk factors for neonatal Group B Streptococcal infection.

There is no need for antibiotic prophylaxis following childbirth except in the case of anal sphincter laceration.

Sexual Assault

In addition to attention to physical injuries, exposure to sexually transmitted infections (STIs) must be considered. Antimicrobial treatment for potential gonorrhoea, chlamydia, bacterial vaginosis, and trichomoniasis should be considered.

Antimicrobial 

Give prophylactic antibiotics if STI testing cannot be performed, or patient is unlikely to return for treatment.

Ceftriaxone 500mg IM single dose

PLUS

Azithromycin 1g PO single dose

PLUS

Metronidazole 2g single dose

Comments and Duration of Therapy 

If testing is available offer screening for STIs:

  • Urine for Chlamydia and Gonorrhoea PCR
  • Vaginal, throat and/or rectal bacterial and viral (dry) swabs for culture and PCR
  • HIV, HBV, and Syphilis serology

See Chapter 8: Genital Infections

If unvaccinated for hepatitis B and HBsAg negative (or unable to test) give first dose HBV vaccine, then repeat at 1-2, and 4-6 months.

Consider anti-retroviral prophylaxis if high risk for HIV.

References

Baker C. Prevention of early-onset group B streptococcal disease in neonates. In: Berghella V, Sexton D, Barss V, editors. UpToDate [internet]. Waltham (MA): UpToDate Inc; 2022. https://www.uptodate.com/contents/prevention-of-early-onset-group-b-streptococcal-disease-in-neonates?search=group%20b%20strep%20in%20pregnancy&source=search_result&selectedTitle=2~150&usage_type=default&display_rank=2#H`3

Cunningham F, Leveno K, Bloom S, Dashe J, Hoffman B, Casey B, et al. editors. Williams Obstetrics. 25th ed. New York: McGraw-Hill; 2018

Duff P. Preterm prelabour rupture of membranes: management and outcome. In: Lockwood C, Barss V, editors. UpToDate [internet]. Waltham (MA): UpToDate Inc; 2021. https://www.uptodate.com/contents/preterm-prelabor-rupture-of-membranes-management-and-outcome?search=premature%20 rupture%20of%20membranes%20treatment&source=search_result&selectedTitle=1~150&usage_type=default&display_rank=1#H1683472693

eTG complete. Genital and Sexually Transmitted Infections. In: Therapeutic Guidelines [digital]. Melbourne: Therapeutic Guidelines Limited; 2019. http://www.tg.org.au

eTG complete. Perinatal infections. In: Therapeutic Guidelines [digital]. Melbourne: Therapeutic Guidelines Limited; 2019. http://www.tg.org.au

Gusmao dos Santos C, Francis J, Guterres J, Janson S, Lopes N, Marr I, et al. HNGV Antibiotic guidelines writing group. Antibiotic guidelines Hospital Nacional Guideo Valadares. Timor-Leste; 2016

Knight M, Chiocchia V, Partlett C, Rivero-Arias O, Hua X< Hinshaw K et al. Prophylactic antibiotics in the prevention of infection after operative vaginal delivery (ANODE): a multicentre randomised controlled trial. Lancet 2019; 393 (10189): 2395-2403. DOI: https://doi.org/10.1016/S0140-6736(19)30773-1