Maternal Sepsis: Early Recognition And Antibiotic Stewardship

Maternal sepsis is a time-critical complication in pregnancy, labour, birth and the postnatal period. Infection may begin with chorioamnionitis, urinary disease, pneumonia, wound infection, mastitis or an intra-abdominal source, then progress rapidly to organ dysfunction. Early recognition depends on clinical judgement, repeated assessment and a coordinated response rather than waiting for a dramatic temperature rise or profound hypotension.

Pregnancy changes the baseline physiology used to judge deterioration. Heart rate, respiratory rate, plasma volume and white cell count may differ from non-pregnant reference ranges, while analgesia, epidural anaesthesia and recent birth can obscure warning signs. A woman can appear composed while developing tachypnoea, altered mentation, oliguria, rising lactate or poor peripheral perfusion.

Treatment must balance urgency with antimicrobial responsibility. Antibiotics should be administered promptly when sepsis is suspected, with cultures and source assessment obtained as soon as this can happen without delaying therapy. Stewardship then continues through accurate diagnosis, daily review, narrowing of treatment and a clear stop date.

This approach is particularly relevant across Australia’s varied maternity system. A tertiary unit in Melbourne or Sydney may have on-site infectious diseases, microbiology and intensive care support, while a hospital near Darwin, Cairns or regional Western Australia may need retrieval coordination and telehealth advice. Safe care requires a process that works in both settings.

Recognising Deterioration Before Collapse

The first assessment should establish whether infection is likely and whether organ function is changing. Important findings include a new or worsening fever, rigors, disproportionate pain, foul-smelling liquor or lochia, uterine tenderness, dysuria, cough, breast inflammation, wound discharge and gastrointestinal symptoms. Warning signs of systemic illness include fast breathing, falling oxygen saturation, confusion, clammy skin, reduced urine output and an unexpectedly high or low temperature.

A single normal observation should not close the case. Trends are often more informative than isolated values, especially after caesarean birth or in women receiving fluids, opioids or antipyretics. Repeat observations, fluid balance, mental state, capillary refill and lactate can reveal deterioration while blood pressure is still preserved. Clinical teams should document the suspected source, time of recognition, escalation decisions and response to treatment.

The fetal and maternal assessment must proceed together before birth. Fetal tachycardia, reduced variability or other signs of compromise may reflect intrauterine infection and maternal physiological stress. Decisions about birth, timing of delivery and fetal surveillance should involve obstetrics, midwifery, anaesthesia and neonatal clinicians. For pregnancies at risk of preterm birth, the principles discussed in fetal lung maturity guidance can help frame discussions about corticosteroids, gestation and neonatal preparation, while infection management remains the immediate priority.

Acting Quickly While Establishing The Source

A sepsis response should have clear local triggers and named responsibilities. Secure intravenous access, collect blood cultures when feasible, request full blood count, electrolytes, renal and liver tests, coagulation studies, blood gas and lactate, and obtain urine and other relevant specimens. Imaging should be guided by the suspected source and pregnancy status; necessary diagnostic imaging should not be withheld when it will change urgent management.

Empirical antimicrobial therapy should reflect the likely site of infection, severity of illness, allergy history, recent antibiotic exposure, colonisation or resistant organisms, and local microbiology data. Australian hospitals commonly use Therapeutic Guidelines alongside their own formulary and antibiogram. A metropolitan service may have rapid laboratory support, whereas a remote service may need to administer the first dose before specimens travel by road or air.

Resuscitation is a parallel task rather than a reason to delay antibiotics. Give oxygen when indicated, manage hypoglycaemia, assess fluid responsiveness and involve critical care early when there is shock, respiratory failure, kidney injury or escalating lactate. Excess fluid can worsen pulmonary oedema, particularly in women with pre-eclampsia, cardiomyopathy or capillary leak, so haemodynamic reassessment is essential.

Source control may require removal of an infected line, drainage of an abscess, treatment of retained products, repair of a wound or urgent birth when intrauterine infection is driving deterioration. If the clinical picture is severe, the receiving intensive care, surgical, anaesthetic and neonatal teams should be contacted early. In rural Queensland or the Northern Territory, this may include retrieval services and a structured handover to a higher-level centre.

Making Antibiotic Stewardship Part Of Emergency Care

Stewardship does not mean withholding treatment from a woman who may be septic. It means giving the right drug, dose and route for the suspected infection, then actively checking whether the initial decision remains appropriate. The first prescription should include an indication, intended duration, review time and relevant microbiology specimens. Weight, renal function, allergy details and recent antimicrobial exposure should be visible to the prescribing team.

At the review point, clinicians should ask whether infection is still the best explanation, whether cultures identify a pathogen, whether imaging has clarified the source and whether organ function is improving. Therapy may be narrowed, stopped, changed to an oral agent or extended for a defined reason. A broad regimen that continues automatically after clinical recovery increases adverse effects, Clostridioides difficile risk, drug interactions and selective pressure for resistance.

The postnatal period presents particular prescribing considerations. Breastfeeding status, neonatal prematurity, infant renal function and the consequences of maternal sedation or gastrointestinal effects should be considered when selecting an agent. Advice from a pharmacist, microbiologist or infectious diseases physician can resolve uncertainty without creating unnecessary delay. Local Australian hospital formularies should also reflect medicine availability, supply interruptions and resistance patterns rather than relying on an outdated standard order.

Documentation is a clinical safety tool. Record the suspected source, cultures collected, first dose time, review plan, response and final diagnosis. When a woman transfers from a regional hospital to a tertiary service in Brisbane, Perth or Adelaide, a complete antimicrobial record prevents duplicated doses and unexplained continuation.

Coordinating Care Across The Perinatal Pathway

Maternal sepsis can affect the fetus or newborn through placental inflammation, prematurity, hypoxia and exposure to maternal antimicrobial therapy. Neonatal staff should receive early notice when intrauterine infection is suspected, maternal haemodynamics are unstable or birth is likely. The handover should include maternal temperature and observations, suspected organism, culture status, antimicrobial doses, duration of membrane rupture and intrapartum events.

After birth, the mother needs a separate review even when the infant is receiving assessment. Persistent fever, increasing pelvic pain, offensive lochia, wound separation, urinary symptoms or breast erythema may indicate a continuing source. Discharge planning should explain which symptoms require urgent review, how medicines should be taken and where follow-up will occur. Families travelling long distances from the Pilbara or Far North Queensland may need a practical plan that accounts for transport, accommodation and access to pathology.

Neonatal jaundice or cholestasis should not automatically be attributed to maternal infection or its treatment. The neonatal cholestasis algorithm illustrates why persistent conjugated hyperbilirubinaemia requires structured investigation and timely specialist involvement. Clear separation of maternal and neonatal problems helps clinicians avoid anchoring on a single explanation.

Communication should include the woman and her support people in plain language. Explain why antibiotics are being started, what tests are being taken, how progress will be measured and when treatment may change. Interpreters should be used when required, and Aboriginal and Torres Strait Islander patients should be offered culturally safe care with appropriate liaison support.

Building Reliable Systems For Prevention And Learning

Prevention begins before a woman becomes unwell. Antenatal screening, vaccination, diabetes management, prompt treatment of urinary infection, careful intrapartum hygiene and appropriate caesarean prophylaxis all reduce preventable risk. Postoperative wound surveillance and consistent hand hygiene remain important after discharge, when symptoms may first appear at home.

Hospitals should audit time to recognition, time to first antibiotic dose, blood culture collection, escalation to senior clinicians, intensive care admission, source control and duration of therapy. These measures should be interpreted with clinical context rather than used as punishment. A delayed dose caused by difficult vascular access or a complex transfer requires a different response from a missed review caused by unclear accountability.

Simulation can strengthen teamwork. Scenarios should include a woman with subtle deterioration, a severe beta-lactam allergy, septic shock after caesarean birth and a patient requiring transfer from a small hospital. Teams can practise closed-loop communication, medication preparation, retrieval calls, fetal assessment and neonatal notification. In Australia, linking these exercises with state maternity networks and local retrieval protocols makes training more realistic.

Every case should produce learning that reaches the ward. Review whether the diagnosis was recognised early, whether treatment matched the likely source, whether de-escalation occurred and whether discharge advice was understood. A culture of respectful review supports both patient safety and responsible antimicrobial use.

Maternal sepsis demands speed, precision and reassessment at every stage. Clinical services can strengthen outcomes by embedding a locally adapted response pathway, maintaining reliable access to senior advice and making antimicrobial review routine. Clinicians, maternity leaders and hospital pharmacists should use the next governance meeting, education session or case review to test these safeguards against the realities of their own service.