%0 Journal Article %A Fernández Vecilla, Domingo %A Ugalde Zarraga, Estíbaliz %A Urrutikoechea-Gutiérrez, Mikel Joseba %A Renzi, Francesco %A Díaz de Tuesta del Arco, José Luis %T Cellulitis and transient bacteremia by Capnocytophaga canis after a cat scratch in an immunocompetent patient %D 2022 %J Access Microbiology, %V 4 %N 5 %@ 2516-8290 %C 000352 %R https://doi.org/10.1099/acmi.0.000352 %K Capnocytophaga %K Cellulitis %K 16S rRNA sequencing %K bacteremia %K Capsular polysaccharide %I Microbiology Society, %X Capnocytophaga canis is still a rare cause of infection. We present a case of an immunocompetent patient admited in the hospital with functional impotence, pain and erythema in his left leg after suffering two scratches from his cat 48 h ago. After obtaining blood and wound cultures, broad-spectrum antimicrobial therapy with intravenous amoxicillin clavulanate was initiated. After 1 day and with a clear improvement of the symptoms the patient was discharged from the hospital with cellulitis and transient bacteremia as diagnosis and completing 1 week of antimicrobial therapy orally. After 80 and 92 h of incubation, both anaerobic flasks were positive. In the Gram-stain Gram-negative rod-shaped bacteria could be observed. Despite subculturing in brucella blood agar, tripticase soy agar with 5 % of sheep blood and chocolate agar, in both anaerobic and microaerophilic conditions, the strain could not be recovered. However, these Gram-negative rods could be identified as C. canis by 16S rRNA sequencing, Capsular typing was performed to study the strain, but none of the studied capsule-types tested positive. C. canis is still a rare cause of human infection, but it must be considered in the differential diagnosis of infections related to bites, scratches and licks from dogs or cats. %U https://www.microbiologyresearch.org/content/journal/acmi/10.1099/acmi.0.000352