Ongoing outbreak of Salmonella enterica serovar Paratyphi A infections, Phnom Penh, Cambodia.

Dear Editor, Salmonella enterica serovar Paratyphi A (Salmonella Paratyphi A) is an emerging pathogen in Asia accounting for 14% (Indonesia) to 64% (southeastern China) of enteric fever cases in this continent [1]. Between January and September 2013, an unusual increase in the number of Salmonella Paratyphi A infections was registered in adult patients attending Sihanouk Hospital Centre of HOPE (SHCH), in Phnom Penh, Cambodia [2]. A similar trend was noted in travellers returning from Cambodia [3]. These findings were shared with the national health authorities and an epidemiological investigation was initiated; up to now, no common source or specific transmission route has been identified. After a temporary decrease in the number of infections by the end of 2013, we presently report another upsurge of infections in Phnom Penh, observed in the period between September 1 st 2013 and September 1 st 2014.