ADULT
ADULT
OBSTETRICS & GYNAECOLOGICAL INFECTIONS
In this topic:
Common organisms:
Neisseria gonorrhoeae
Chlamydia trachomatis
Bacteroides sp.
Enterobacterales
Haemophilus influenzae
Streptococcus sp. especially Streptococcus agalactiae (GBS)
Gardnerella vaginalis
Ureaplasma urealyticum
Mycoplasma hominis
1.1 Outpatient (mild)
Preferred
Ceftriaxone 500mg IM in a single dose
(if BW>150kg, 1g IM STAT)
PLUS
Metronidazole 400mg PO q12h for 14 days
PLUS
Doxycycline 100mg PO q12h for 14 days
Alternative
If cephalosporin allergy and low risk for gonorrhoea:
Levofloxacin 500mg PO q24h for 14 days
PLUS
Metronidazole 400mg PO q12h for 14 days
Comments
Sexual partner(s) within 60 days should be examined, investigated and treated epidemiologically for chlamydia and gonorrhoea, regardless of PID aetiology or pathogen isolated.
Abstain from sex until the patient and partner(s) have completed treatment and symptoms are resolved.
1.2 Inpatient (moderate-severe)
Preferred
Alternative
Ampicillin/sulbactam 3g IV q6h
PLUS
Doxycycline 100mg PO q12h
OR
Clindamycin 900mg IV q8h
PLUS
Gentamicin 3-5mg/kg IV q24h
*Oral step-down therapy:
Clindamycin 450mg PO q6h or 600mg PO q8h
OR
Doxycycline 100mg PO q12h
PLUS
Metronidazole 400mg PO q12h
Comments
Duration: 14 days
Tubo-ovarian abscess: Surgical intervention for source control may be required.
May need to consider tuberculosis if not responding to standard treatment.
*Patients with clinical improvement after 24-48 hours can be transitioned to oral therapy to complete the 14 days of treatment.
2.1 In Non-pregnant Women
Refer to treatment guideline for severe PID
2.2 Postpartum Endometritis
Preferred
Amoxicillin/clavulanate 1.2g IV q8h
OR
Ampicillin/sulbactam 3g IV q6h
Alternative
Cefotaxime 1g IV q8h
PLUS
Metronidazole 500mg IV q8h
PLUS
Gentamicin 5mg/kg IV x 1 dose
OR
Clindamycin 900mg IV q8h
PLUS
*Gentamicin 5mg/kg q24h
Comments
IV treatment is typically continued until the patient is clinically improved (no fundal tenderness) and afebrile for 24 - 48 hours.
If an oral antibiotic regimen is administered, duration: 14 days.
*TDM for gentamicin is required
2.3 Atrophic Endometritis
Example:
Post-menopause
Post-chemoradiotherapy
Antibiotic not required.
Common organisms:
Bacteroides sp. especially Prevotella bivia
Streptococcus sp. (Grp A, Grp B),
Enterobacterales
Chlamydia trachomatis
Ureaplasma urealyticum
Preferred
Ampicillin/sulbactam 3g IV q6h
PLUS
Doxycycline 100mg PO q12h
Alternative
Ampicillin 2g IV q4-6h
PLUS
Metronidazole 500mg IV q8h
PLUS
Gentamicin 5mg/kg IV q24h
OR
Clindamycin 900mg IV q8h
PLUS
*Gentamicin 5mg/kg IV q24h
Comments
Duration: 10-14 days
Intravenous antibiotics are administered until the patient has improved and afebrile for 48 hours, then are typically followed by oral antibiotics.
*TDM for gentamicin is required
Preferred
Ampicillin/sulbactam 3g IV q6h
(Regardless of the mode of delivery)
Alternative
Ampicillin 2g IV q6h
PLUS
Gentamicin 5mg/kg IV q24h
If the patient is undergoing a cesarean delivery:
Ampicillin 2g IV q6h
PLUS
Gentamicin 5mg/kg IV q24h
PLUS
Metronidazole 500mg IV q8h
Mild antibiotic allergy:
Cefazolin 2g IV q8h
PLUS
Gentamicin 5mg/kg IV q24h
Severe antibiotic allergy:
Clindamycin 900mg IV q8h
Comments
Antibiotic regimen is continued postpartum until the patient is afebrile and asymptomatic for at least 48 hours.
There is no evidence that continuation with oral antibiotic are beneficial after discontinuation of parenteral therapy.
Indications of IAP: Previous infant with invasive GBS disease, preterm labour, GBS carriage in previous pregnancy, PPROM with known GBS carrier, GBS carriage in current pregnancy, GBS bacteriuria
Preferred
Benzylpenicillin 5MU IV initial dose, then 2.5–3MU IV q4h until delivery
Alternative
Ampicillin 2g IV initial dose, then 1g IV q4h until delivery
Mild antibiotic allergy:
Cefazolin 2g IV initial dose, then 1g q8h until delivery
OR
Cefuroxime 1.5g IV STAT and 750mg IV q8h until delivery
Severe antibiotic allergy:
Vancomycin 15-20mg/kg IV q8-12h until delivery
OR
Clindamycin 900mg IV q8h until delivery
Comments
Prophylaxis begins at hospital admission for labour or rupture of membrane and continued every four hours until the infant is delivered.
Treatment is not indicated if Caesarean section is performed before onset of labour with intact membrane (please use standard surgical prophylaxis).
Antenatal treatment is not recommended for GBS cultured from a vaginal or rectal swab.
6.1 Non-GBS carrier
Preferred
Erythromycin ethylsuccinate 400mg PO q6h or 800mg PO q12h for 7-10 days
Alternative
--
Comments
--
6.2 GBS carrier
Preferred
Ampicillin 2g IV q6h for 48 hours
PLUS
*Azithromycin 1g PO STAT upon admission
Followed by:
Amoxicillin 500mg PO q8h for an additional 5-7 days or until delivery whichever comes first
Alternative
--
Comments
*To cover for Ureaplasmas – important cause of chorioamnionitis & Chlamydia
Common organisms:
Staphylococcus aureus (MSSA)
Streptococcus pyogenes (Group A, B)
Escherichia coli
Bacteroides sp.
Corynebacterium sp.,
CoNS
7.1 Outpatient
Preferred
Cloxacillin 500mg PO q6h
Alternative
Cephalexin 500mg PO q6h
Comments
Duration: 5-7 days. If poor response, may consider extending to 10-14 days.
7.2 Inpatient
Preferred
Cloxacillin 2g IV q4-6h
Alternative
Cefazolin 1-2g IV q8h
Comments
Duration: 5-7 days. If poor response, may consider extending to 10-14 days.
8.1 Mild
Preferred
Cloxacillin 500mg PO q6h for 5-7 days
Alternative
Antibiotic allergy:
Erythromycin ethylsuccinate 400mg PO q6h or 800mg PO q12h for 5-7 days
Comments
Appropriate dressing is the mainstay of treatment.
8.2 Moderate - Severe
Preferred
Cloxacillin 2g IV q6h
OR
Cefazolin 1-2g IV q8h
Alternative
Risk of gram negative or anaerobic infection (e.g. diabetes):
Amoxicillin/clavulanate 1.2g IV q8h
OR
Ampicillin/sulbactam 3g IV q6h
Comments
Duration: 10-14 days but shorter duration (5-7 days) can be considered if adequate source control and local wound management result in clinical improvement.
Preferred
Amoxicillin/clavulanate 625mg PO q8h
Alternative
Trimethoprim/sulfamethoxazole 160mg/800mg PO q12h
Comments
Duration: 5-7 days
If the patient has risk factors for sexually transmitted infections (STIs), appropriate investigations should be performed, and empirical treatment initiated as outlined in the STI chapter.
Surgical management is recommended if the abscess does not drain spontaneously.
References:
Sexually Transmitted Disease Treatment Guideline 2021: Centre for disease Control And Prevention (CDC)
United Kingdom National Guideline for the Management of Pelvic Inflammatory Disease (BASHH) 2019
University Malaya Medical Centre (UMMC) Antibiotic Guideline 2020
Best practice in abortion care. Royal College of Obstetricians & Gynaecologists. March 2022.
Fouks Y, Samueloff O, Levin I, Many A, Amit S, Cohen A. Assessing the effectiveness of empiric antimicrobial regimens in cases of septic/infected abortions. Am J Emerg Med. 2020 Jun;38(6):1123-1128. doi: 10.1016/j.ajem.2019.158389. Epub 2019 Aug 17. PMID: 31443937.
Savaris RF, de Moraes GS, Cristovam RA, Braun RD. Are antibiotics necessary after 48 hours of improvement in infected/septic abortions? A randomized controlled trial followed by a cohort study. Am J Obstet Gynecol. 2011 Apr;204(4):301.e1-5. doi: 10.1016/j.ajog.2010.11.017. Epub 2010 Dec 31. PMID: 21195382.
Hughes RG, Brocklehurst P, Steer PJ, Heath P, Stenson BM on behalf of the Royal College of Obstetricians and Gynaecologists. Prevention of early-onset neonatal group B streptococcal disease. Green-top Guideline No. 36. BJOG 2017;124:e280–e305.
Prevention of Group B Streptococcal Early-Onset Disease in Newborns Guideline. Committee Opinion No. 797 (Replaces Committee Opinion No. 782, June 2019. Reaffirmed 2022. The American College of Obstetricians & Gynaecologists.
NICE Guideline.Preterm labor and birth.https://www.nice.org.uk/guidance/ng25/resources/preterm-labour-and-birth
Prevention of Perinatal Group B Streptococcal Diseases: Revised Guideline 2010. Centre for disease Control And Prevention (CDC).
WHO recommendations for prevention and treatment of maternal peripartum infections 2015.
Bacterial sepsis following Pregnancy. Royal College of Obstetricians & Gynaecologists. Green-Top Guideline No. 64b, April 2012.
Mackeen AD, Packard RE, Ota E, Speer L. Antibiotic regimens for postpartum endometritis. Cochrane Database Syst Rev. 2015 Feb 2;2015(2):CD001067. doi: 10.1002/14651858.CD001067.pub3. PMID: 25922861; PMCID: PMC7050613.
Siegler Y, Weiner Z, Solt I. ACOG Practice Bulletin No. 217: Prelabor Rupture of Membranes. Obstet Gynecol. 2020 Nov;136(5):1061. doi: 10.1097/AOG.0000000000004142. PMID: 33093409.
World Health Organization. Mastitis: causes and management, 2000
Antibiotic prophylaxis for prevention of postpartum perineal wound complications: a randomized controlled trial, 2008
Buppasiri P, Lumbiganon P, Thinkhamrop J, Thinkhamrop B. Antibiotic prophylaxis for third‐ and fourth‐degree perineal tear during vaginal birth. Cochrane Database of Systematic Reviews 2014, Issue 10. Art. No.: CD005125. DOI: 10.1002/14651858.CD005125.pub4.
The Sanford Guide to Antimicrobial Therapy 2022, 52nd Edition.
Knight, M., Chiocchia, V., Partlett, C. et al:. Prophylactic antibiotics in the prevention of infection after operative vaginal delivery (ANODE): a multicentre randomised controlled trial. The Lancet, 393(10189), 2395–2403. https://doi.org/10.1016/s0140-6736(19)30773-1.
Ministry of Health (MOH) Malaysia Handbook of Obstetrics Guideline 2024
Guideline No. 430, Society of Obstetrician and Gynaecologist of Canada (SOGC) 2022
Caesarean section wound infection, NHS Lothuan, Scotland.