Skip to content

Biological Health Hazard – Listeria (Listeriosis) Outbreak: Green leafy vegatable contamination (Fatal) – USA/Canada


Published Date: 2016-03-02 11:14:25
Subject: PRO/AH/EDR> Listeriosis – USA, Canada (04): fatal, pre-packed salads, same genotype
Archive Number: 20160302.4062396

Date: Mon 29 Feb 2016
Source: Food Poisoning Bulletin [edited]

The state of New York has been hard hit in the _Listeria monocytogenes_ outbreak linked to recalled Dole salad mixes. 4 people in that state are sick. At least 18 people in 9 states have been infected with the outbreak strain of _Listeria_. Whole genome sequencing has been performed on samples from all of these people and the bacteria that sickened them are “highly related” genetically.

All 18 people sickened in this particular outbreak have been hospitalized. One person has died “as a result of listeriosis.” according to the CDC. That person lived in Michigan. The most recent illness was diagnosed on [31 Jan 2016], so the outbreak numbers may grow.

The brand names of the salad mixes include Dole, Fresh Selections, Simple Truth, Marketside, The Little Salad Bar, and President’s Choice Organics. The types of salad mixes recalled include American salads, arugula salads, Bacon and bleu cheese salads, BBQ Ranch salad, Caesar salads, Chipotle, and cheddar salads, Coleslaw mix, Field green salads, Garden salads, Iceberg salads, Italian blend salads, Kale salads, Lettuce salads, Mediterranean salads, Romaine salads, Sesame ginger salads, Southwest salads, Spinach Salads, Spring Mix salads, Sunflower salads, and Vegetable blend salads.

We would list the states where the recalled salads were sold, but we have received reports about them being sold in states not listed on the CDC website, so just look for the letter “A” at the beginning of the code near the “Enjoy By” date.

If you have one of these salads in your fridge, throw it away, wash your hands, then clean out your fridge with a mild bleach solution. The recalled salads should all have expired by now, so they should no longer be in consumers’ homes. And Dole halted production at their Springfield, Ohio plant that is the center of this outbreak investigation in mid January. The recalled salad mixes all have number codes that start with the letter “A”. If you have eaten one of the recalled salads and have experienced the symptoms of listeriosis, the illness caused by this bacteria, see your doctor.

It’s worth noting that while most people get sick within a few weeks of exposure to the pathogenic bacteria, sometimes the illness can be delayed up to 70 days. If you ate one of these salads in January [2016], for instance, be aware of any illness development until late March [2016]. This outbreak actually began back in July 2015, but was not discovered until January 2016.

People who are at higher risk for listeriosis include older adults, children, people with weakened immune systems, those with chronic illnesses, and pregnant women, although even healthy people can become sick. The symptoms of listeriosis include fever, muscle aches, headache, stiff neck, confusion, and loss of balance. Pregnant women usually only experience fever or non-specific symptoms such as headache and chills, but listeriosis can cause miscarriage, stillbirth, premature labor, and a serious infection in the newborn.

[Byline: Linda Larsen]

Communicated by:
ProMED-mail from HealthMap Alerts

[The news report above increases the number of US cases in the Dole salad mix listeriosis outbreak from 15 to 18 and the number of states involved from 8 to 9 since the last ProMED-mail post (Listeriosis – USA, Canada (02): fatal, recall, pre-packed salads, same genotype 20160131.3980669). This outbreak also extended into Canada where 7 people fell ill between September 2015 and the beginning of January 2016. Genotypes of clinical isolates from ill people in the Canadian listeriosis outbreak matched those from the US outbreak. Both outbreaks were linked to packaged salads produced at the Dole processing facility in Springfield, Ohio.

For discussions of listeriosis, please see my comments in prior ProMED-mail posts listed below. – Mod.ML

A HealthMap/ProMED-mail map can be accessed at:]

See Also

Listeriosis – USA, Canada (03): fatal, pre-packed salad, same genotype 20160218.4030635
Listeriosis – USA, Canada (02): fatal, recall, pre-packed salads, same genotype 20160131.3980669
Listeriosis – USA, Canada: fatal, recall, pre-packed salads, RFI 20160123.3960428
Listeriosis – Canada: fatal, pre-packed vegetables susp, RFI 20160122.3956200
Listeriosis – USA: fatal, ice cream, follow-up 20160103.3907900
Listeriosis – USA (07): ice cream, whole gene sequencing detection 20150506.3344944
Listeriosis – USA (06): (KS,TX) fatal, nosocomial, ice cream, recall, update 20150411.3291517
Listeriosis – USA (04): (KS) fatal, nosocomial, ice cream 20150315.3231917
Listeriosis – USA (05): (WA) ice cream, gelato, custard, sorbet, alert 20141229.3060474
Listeriosis – Canada: (ON,MB) ex USA, susp, same genotype 20141226.3055407
Listeriosis – USA (04): fatal, caramel-coated and pre-packaged apples, alert 20141219.3044758
Listeriosis – USA (03): (IL, MI) fatal, sprouts, recall 20141109.2941351
Listeriosis – USA (02): 2013, fatal, cheese 20140410.2394195
Listeriosis – USA: (CA, MD) fatal, Hispanic-style soft cheese, recall 20140222.2294169

A ProMED-mail post
ProMED-mail is a program of the International Society for Infectious Diseases


UPDATED: CDC investigating deadly Listeriosis outbreak linked to various Dole salads


Note: Category B bioterrorism pathogens are the second highest priority organisms/biological agents. They are moderately easy to disseminate, result in moderate morbidity rates and low mortality rates and require specific enhancements for diagnostic capacity and enhanced disease surveillance.

These pathogens include food safety threats Category B agents are bacteria and viruses that may cause only mild disease to humans, but sometimes may be fatal, they are difficult to contract via aerosol in a lab setting.

Leave a Comment

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s