Date: Mon 12 May 2019
Source: Outbreak News Today [edited]
67 confirmed _Salmonella_ cases and 2 probable cases have been linked to sprouts consumption in New Zealand. Illness onset ranged from 23 Dec 2018 to 1 Apr 2019. 66 of the cases became ill between 23 Jan 2019 and 25 Jan 2019. 17 people required hospital treatment.
In the wake of the outbreak, GSF New Zealand [produce manufacturer] recalled certain Pams, Sproutman, and Fresh Harvest brand sprout products. GSF New Zealand said the recall was due to a "production process concern." Regarding the _Salmonella_ outbreak, New Zealand's Ministry of Health reported that "_Salmonella_ Typhimurium phage type 108/170 was the causative pathogen identified from cases, sprouts, and spent irrigation water tested in this outbreak. Subtyping using multiple locus variable-number tandem repeat analysis (MLVA) and whole genome sequencing methods were performed on isolates to confirm cases in the outbreak as well as the outbreak source."
The recalled sprouts had best before dates of 31 Mar 2019 to 4 Apr 2019.
Fresh Harvest branded sprouts were sold throughout the North Island at Countdown, Fresh Choice, and SuperValue. Pams Superfoods Super Salad Mix was sold throughout NZ. Other brands of Pam sprouts were sold on the North Island. Sproutman branded sprouts were sold throughout NZ. [Byline: Jory Lange]
[A number of significant pathogens, including _Salmonella_, _Listeria_, and enterohemorrhagic _E. coli_, have been linked to transmission from ingestion of a whole variety of different kinds sprouts in the USA and elsewhere.
The following is a relatively recent review on outbreaks caused by sprouts:
Dechet AM, Herman KM, Chen Parker C, et al: Outbreaks caused by sprouts, United States, 1998-2010: lessons learned and solutions needed. Foodborne Pathog Dis. 2014; 11(8): 635-44.
After a series of outbreaks associated with sprouts in the mid-1990s, the US Food and Drug Administration (FDA) published guidelines in 1999 for sprouts producers to reduce the risk of contamination. The recommendations included treating seeds with an antimicrobial agent such as calcium hypochlorite solution and testing spent irrigation water for pathogens. From 1998 through 2010, 33 outbreaks from seed and bean sprouts were documented in the USA, affecting 1330 reported persons. 28 outbreaks were caused by _Salmonella_, 4 by Shiga toxin-producing _Escherichia coli_, and one by _Listeria_. In 15 of the 18 outbreaks with information available, growers had not followed key FDA guidelines. In 3 outbreaks, however, the implicated sprouts were produced by firms that appeared to have implemented key FDA guidelines. Although seed chlorination, if consistently applied, reduces pathogen burden on sprouts, it does not eliminate the risk of human infection. Further seed and sprouts disinfection technologies, some recently developed, will be needed to enhance sprouts safety and reduce human disease. Improved seed production practices could also decrease pathogen burden, but, because seeds are a globally distributed commodity, will require international cooperation." - ProMED Mod.LL]
[HealthMap/ProMED-mail map of New Zealand: