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

Capnocytophaga canimorsus — Capnocytophaga

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

Flavobacteriaceae · Gram-negative

Capnocytophaga canimorsus : commensal de la cavité orale du chien et du chat. Responsable d'un sepsis fulminant après morsure ou griffure (symptômes 1 à 8 jours après la morsure — Pers 1996), PARTICULIÈREMENT chez les patients aspléniques (splénectomisés, asplénie fonctionnelle de la drépanocytose), cirrhotiques, ou immunodéprimés (corticoïdes, immunosuppresseurs). Chez l'asplénique mordu par un chien, IDSA 2014 recommande une antibiothérapie préemptive précoce (duration not verified) et une prise en charge hospitalière sans délai — see cited source. Tableau : sepsis avec CIVD + purpura fulminant + nécroses périphériques (ischémie des extrémités). Mortalité élevée même avec traitement. La plaie de morsure peut sembler bénigne. Hémocultures (bactérie fastidieuse, croissance 3-7 jours).

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 Capnocytophaga canimorsus are described in the cited literature. The reported frequency is not an individual probability.

Organ	Tropism	Level of evidence	Sources	Spread route
Skin	High tropism	Evidence C	2	not recorded
Meninges	Moderate tropism	Evidence C	2	not recorded
Heart / Endocardium	Rare tropism	Evidence C	2	not recorded

Spread routes recorded: 0 of 3 documented foci A focus without a route is not a focus without spread: the route is simply not recorded.

Associated syndromes

• Bacterial skin infections

Sources

• Pers C et al. — Capnocytophaga canimorsus septicemia in Denmark, 1982-1995: review of 39 cases (Clin Infect Dis) (1996) — doi:10.1093/clinids/23.1.71
• Butler T — Capnocytophaga canimorsus: an emerging cause of sepsis, meningitis, and post-splenectomy infection after dog bites (Eur J Clin Microbiol Infect Dis) (2015) — doi:10.1007/s10096-015-2360-7

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