Multistate product traceforward investigation to link imported romaine lettuce to a US cyclosporiasis outbreak - Nebraska, Texas, and Florida, June-August 2013.

Abstract:

:During June-August 2013, 25 US states reported 631 cyclosporiasis cases including Nebraska and Iowa where a regional investigation implicated common-source imported salad mix served in two chain restaurants. At least two common-origin growing fields were likely sources of contaminated romaine lettuce. Using producer- and distributor-provided data, we conducted a grower-specific traceforward investigation to reveal exposures of ill US residents elsewhere who reported symptom onset during 11 June-1 July 2013, the time period established in the Nebraska and Iowa investigation. Romaine lettuce shipped on 2-6 June from one of these Mexico-origin growing fields likely caused cyclosporiasis in 78 persons reporting illness onsets from 11 June to 1 July in Nebraska, Texas, and Florida. Nationwide, 97% (314/324) of persons confirmed with cyclosporiasis with symptom onset from 11 June to 1 July 2013 resided in 11 central and eastern US states receiving approximately two-thirds of romaine lettuce from this field. This grower's production practices should be investigated to determine potential sources of contamination and to develop recommendations to prevent future illnesses.

journal_name

Epidemiol Infect

authors

Buss BF,Joshi MV,Dement JL,Cantu V,Safranek TJ

doi

10.1017/S0950268815002320

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

2709-18

issue

13

eissn

0950-2688

issn

1469-4409

pii

S0950268815002320

journal_volume

144

pub_type

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