Educational resource · Not a medical device · Infectious diseases review in progress · Does not replace clinical judgement

Serratia marcescens — Serratia

Review by an infectious diseases specialist in progress · edited by a physician, AI-assisted writing · level of evidence computed from the source type · page as of 29 October 2026 · Methodology

Yersiniaceae · Gram-negative

Serratia marcescens est une entérobactérie à céphalosporinase chromosomique inductible (AmpC), comme Enterobacter — risque de sélection de mutants résistants aux C3G en cours de traitement. Bactérie quasi-exclusivement nosocomiale, classiquement associée à la réanimation, la néonatologie, et les patients immunodéprimés. Caractéristique pigmentaire : colonies rouge-rosées (prodigiosine) — aide à l'identification. Peut provoquer des épidémies nosocomiales (clones endémiques, biofilm sur matériel médical). Signalement aux autorités sanitaires si résistance aux carbapénèmes (EPC). Traitement : carbapénèmes pour les infections sévères (risque de déréfinition des C3G). Cefépime ou pipéracilline-tazobactam possibles selon antibiogramme.

Scope: dosing as described in the cited guidelines (French or international context, stated by the source), for adults with normal renal function unless stated on the line. No renal or hepatic, paediatric or pregnancy adjustment is provided systematically. These regimens have not been reviewed by any infectious-disease specialist to date.

Documented organ tropism

Organs where foci of Serratia marcescens are described in the cited literature. The reported frequency is not an individual probability.

Organ	Tropism	Level of evidence	Sources	Spread route
Lung (PAVM)	High tropism	Evidence B	1	not recorded
Urinary system / Bladder (nosocomiale)	High tropism	Evidence B	1	not recorded
Meninges (méningite néonatale ou post-neurochirurgicale)	Moderate tropism	Evidence B	1	not recorded
Eye	Moderate tropism	Evidence C	1	not recorded

Spread routes recorded: 0 of 4 documented foci A focus without a route is not a focus without spread: the route is simply not recorded.

Sources

• Kalil AC et al. — IDSA/ATS Management of Adults with HAP/VAP (2016) — doi:10.1093/cid/ciw353
• IDSA — Diagnosis, Prevention and Treatment of Catheter-Associated UTI (CID) (2010) — doi:10.1086/650482
• Becker K et al. — Coagulase-negative staphylococci (CMR) (2014) — doi:10.1128/CMR.00109-13

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