The FDA is currently investigating a multi-state outbreak of salmonella enteritidis linked to chicken eggs from as many as 13 separate brands.  An estimated 266 people in California alone have been infected by consuming the  contaminated eggs.  So far, no deaths have been reported.

A recall, which includes all 13 egg brands, involves eggs all originating from an Iowa company.  While the Wright County Egg of Galt, Iowa won’t confirm how many, experts have estimated up to 228 million eggs will be recalled from across the nation.  For additional information, read the FDA’s press release.

UPDATE (9/1/2010):  Since this recall was issued two weeks ago, the FDA egg recall has grown to include dozens of egg brands, all with similar plant numbers–typically beginning with a “P.”  The Egg Safety Center has put together a comprehensive list of all the egg products included in the recall.  If eggs you have purchased are included in the recall, don’t eat them.

Salmonella typhi is famous.  It’s killed millions since it first received attention in 430 BC when it swept through Athens and killed one third of the population–including their leader, Pericles.  More commonly known as “Typhoid Fever,” salmonella typhi is identified as a “serious public health problem” by the World Health Organization (WHO).  Anywhere from 16-33 million cases worldwide are reported annually.  People still die from this disease today–about 216,000 per year–most frequently in locations where food is not cleansed and handled properly.

Salmonella typhi presents with a number of symptoms including fever, heavy sweating, abdominal cramps, diarrhea, headache, cough, bloody noses, and rose-colored spots.  Lasting for as many as four weeks, typhoid fever can also seriously affect the lungs, spleen, liver, and brain.  As with most salmonella strains, infection generally comes from cross-contamination of contaminated foods to clean, ready-to-eat foods.  Poor sanitation and personal hygiene are also major factors.  In locations where salmonella typhi is prevalent, animals and insects are in regular contact with both feces and ready-to-eat foods, spreading bacteria from one to the other.  In the United States, salmonella typhi infections have been reduced due to education about the importance of hand washing after using the bathroom and covering the mouth and nose when coughing.  In addition to these personal hygiene measures, we are also fortunate to enjoy modern plumbing and chlorinated water that separate us from the bacteria our bodies produce.

Unlike most foodborne illnesses, certain persons infected with typhoid fever may not even know they’re sick.  In one famous case, a woman named Mary Mallon infected 53 people during her career as a cook–three of whom died.  Although she denied being infected with salmonella typhi until her death, the disease followed her from home to home, leaving a trail of suffering in her wake.  Typhoid Mary unwittingly infected the families for whom she worked by coughing, sneezing, not washing her hands, and then handling ready-to-eat foods and preparing beverages.  The legacy she left behind when she passed away from unrelated causes, was the critical importance of hand washing, vaccination, and cooking food thoroughly. Click here and here for some period posters about the ability to prevent this disease.

Finally, here is a list of famous victims of salmonella typhi:

• Abigail Adams–second First Lady of the United States
• Louisa May Alcott–author of Little Women
• Charles Darwin–naturalist, author of On the Origin of Species
• Mary Todd Lincoln–wife of Abraham Lincoln
• Wilbur Wright–one of the Wright Brothers
• Anne Frank–famous diary writer (Diary of Anne Frank)
• Pericles–famous orator and statesman in ancient Athens

Facts Source:  Wikipedia

The U.S. Center for Disease Control (CDC) has successfully identified the culprit in a recent multi-state outbreak of typhoid fever:  sapote fruit.  Called “mamey” fruit in the U.S., the grapefruit-size Sapote is grown commonly in Mexico and has a sweet, juicy pulp commonly used in ice creams and milkshakes.  The CDC became involved when local health departments in California and Nevada began reporting consumers infected with typhoid fever.  About 400 Americans become ill with typhoid fever annually, most while traveling in South America.  This scenario was strange because the infected persons had not been outside the United States when they contracted the disease.

CDC officials report that frozen sapote fruit pulp, used in milkshakes consumed by every person involved in the outbreak, was infected with Salmonella Typhi–more commonly known as typhoid fever.  The distributor, Goya Foods, Inc., has recalled its 14oz bags of Sapote (mamey) Fruit Pulp which were distributed in Alaska, Arizona, California, Colorado, New Mexico, Nevada, Oregon, Texas, Utah, and Washington.   Unfortunately (and curiously) additional information is not available on the distributor’s website.

As an adult working the food safety industry, it horrifies me to think of how many food items my childhood self dropped on the floor and promptly picked up and put into my mouth.  I believed in the “5-Second Rule” like it was the 11th commandment.  In my young mind, it made perfect sense that the quicker I retrieved the tasty treat I had dropped, the greater were my chances of it arriving to my mouth “germ free.”  As I grew older I amended the rule:  “Does not apply if:  sticky, gooey, cheesy, or dropped in a public place/floor of car . . . “  That having been said, I admit that anything that qualifies as having a “candy shell” will probably still make it to my mouth after hitting the floor.  You would think I’d have a stronger immune system.

The July 2010 edition of National Geographic profiles the recent findings of Paul Dawson, Ph.D. and his graduate students (complete findings published in the Journal of Applied Microbiology).  He states, “The five-second-rule is a popular belief that if you drop food on the floor and pick it up within five seconds, it won’t be too germ laden to eat. It’s not true and we’ve proven it, it’s well, bologna.”  His study shows that foodborne illnesses like Salmonella can survive on a dry surface for up to four weeks and transfer immediately to food items upon contact.  In fact, the research was so conclusive that National Geographic has coined the new phrase “the Zero-Second Rule.”  That’s how much time, they state, your food has on the floor before it’s contaminated.  Bummer.

Sources:  National Geographic, Clemson University, Delish.com

Photo Credit:  Rebecca Hale, National Geographic Staff

The Center for Disease Control released some incredible findings this month–and since then the sun has shown a little less brightly for salsa and guacamole lovers (your humble author not excluded).  According to the CDC, fresh salsas and guacamole are the causes of 1 in 25 foodborne illness outbreaks in restaurants and delis across the United States.  Specifically, of the 136 salsa/guacamole cases reported of foodborne illness outbreaks during a 10 year period, 36 were linked directly to guacamole, 95 to salsa, and the rest to both.  CDC representative, Robert Tauxe, specifically noted that all the cases involved freshly-prepared guacamole and salsas–not commercially packaged products.

Norovirus, which moms tend to call “the 24-hour flu” or “stomach flu,” thrives in environments where cut and porous vegetables (such as avocados, cilantro, peppers, and tomatoes) are left uncovered and poorly refrigerated.  In fact, Tauxe reported that the most common pathogens associated with these outbreaks were norovirus, salmonella, and E.coli, which all cause stomach pain, vomiting and diarrhea in various degrees of intensity.

This study, which began in 2008, was originally prompted by an outbreak in St. Paul, MN in which 1,400 people were sickened by contaminated Serrano and jalapeño peppers used in freshly-prepared salsa.   Researchers examined reported restaurant and deli outbreaks from 1998 to 2008 and found that salsa and guacamole contributed to 3.9% of cases–a +200% jump from the previous decade.  Investigators are unsure what specific ingredients are leading to the contamination, but report that due to the varying recipes of salsa and guacamole, it is unwise to depend on the acidity of lemon or lime juice to fight off the growth of foodborne illness.

Micheal Doyle of the University of Georgia’s Center for Food Safety put it best when he said, “Refrigeration is the key to safe salsa.”  We’ll assume he meant guacamole too.

Image Source:  La Fonda Restaurant

Source:  USA Today

Salmonella

When talking about food safety, salmonella is a disease that gets brought up frequently.  This year, salmonella has prompted hundreds of food recalls from items as diverse as salami, tortilla chips, and salad dressing.  During the past few years, health officials have identified the bacteria in eggs, peanuts, black pepper, spinach, meat products and the list goes on and on.  Salmonella contamination becomes an even greater issue when contaminated food items are sent to multiple locations as ingredients as other products.  It becomes extremely difficult to trace where the infection began, and how far it spread.  This year alone, salmonella-contaminated black pepper was distributed as an ingredient in Italian-style deli meats, which then infected 252 people in 44 different states!  The same contaminated black pepper has also sparked countless spice, snack, and condiment recalls since January 2010.

Of the 2,000 strains of salmonella, only about a dozen can infect humans.  Still, the number of persons infected annually remains high from year to year.  The CDC estimates that there are a 1.4 million cases of salmonella infection each year in the United States, with only about 3% officially reported.  These numbers make is clear that it is impossible to overstate how crucial it is that food handlers become aware of this disease and how to protect consumers from it.

A few things to know about Salmonella:

• Salmonella can be transmitted from animals to humans (see Kissing Frogs) and from food to humans.
• Persons at greater risk for serious infection include infants, small children, chronically ill persons with weak immune systems, and the elderly.
• Salmonella can survive for weeks outside a living body.
• Salmonella is not destroyed by freezing.
• An infectious dose of salmonella can be as small as 15-20 cells (bacteria).
• Incubation period–the time it takes to get sick once a patient has contracted the disease–is anywhere from six to 72 hours.
• Common symptoms of salmonella infection include exhaustion, nausea, vomiting, and diarrhea (which can be bloody in serious cases!).

What can you do to prevent salmonella infection in the workplace?  One of the first things each food service employee must do to prevent infection of any kind is wash their hands.  For salmonella-specific prevention, the Mayo Clinic recommends the following practices:

1. Cook poultry, ground beef, and eggs thoroughly before eating (or serving).   Poultry specifically must reach 160º F throughout before it can be served.
2. Eggs must be cooked until they have a hard yoke.  Pasteurized eggs may also be used.  If consumers insist on soft yokes, they must be made aware of the risk of salmonella infection.
3. Never consume or serve raw milk.  Milk must be pasteurized to be used in a consumer setting.
4. Wash and sterilize hands, utensils, and surfaces immediately after they have come in contact with foods of animal origin.
5. Be extremely cautious when preparing food for babies, children, sick persons, or the elderly as they are at a greater risk of infection.

If you have additional questions about salmonella and how to prevent it, please contact your local health department.

Sources:  Mayo Clinic, Wikipedia

The US Department of Health and Human Services released an interesting article this morning about animals and their uncanny ability to give people salmonella–specifically birds, frogs,  snakes, turtles, and other amphibians.  Contact with these animals causes about 74,000 cases of salmonella each year in the United States, according to the Center for Disease Control (CDC).   Normally, salmonella is considered a foodborne illness, but children tend to handle these animals and then touch their mouths, eyes, and noses without washing their hands.  After the release of the animated film The Princess and the Frog, in 2009, dozens of little girls became ill with salmonella after feeling compelled to kiss frogs.  Even adults can become culprits of spreading salmonella this way when they clean aquariums and fish tanks in the kitchen, thereby contaminating areas where food is prepared.

Linda Capewell of the CDC recommends not having birds, snakes, or amphibians in homes with children under 5 years of age.  When children (and adults) handle these animals, they should wash their hands immediately–scrubbing with antibacterial soap for at least 20 seconds in a steady stream of warm water.