Backyard chickens (credit: Meredith Hall)

The recent salmonella outbreak has led to a recall of half a billion eggs, and has sickened thousands of people. (Check this FDA page to see if the eggs in your fridge are safe to eat.) Many of the contaminated eggs have been traced to two giant farms in Iowa. It is not entirely clear what caused the outbreak—and there may have been multiple sources. But at least some of the contaminated eggs were laid by hens that ate contaminated chicken feed. Rodents carrying salmonella had gotten into the feed. In large-scale egg farms, salmonella can spread easily. Backyard chickens can still be subject to salmonella, but at least if you’re in charge of the coop, you can be sure to take precautions to keep your birds healthy.

These precautions include keeping the habitat clean, making sure the food isn’t contaminated by rodents or other animals (reptiles carry salmonella too), and maybe even vaccinating your chickens. Vaccination is common in the UK and other parts of Europe (though in this country, the FDA has deemed it unnecessary). I have no idea if vaccines are available for backyard birds—but it might be a good idea.

Not being a bird owner myself, I wondered how a first-time chicken raiser could learn about keeping birds healthy. I read Oakland urban farmer Novella Carpenter’s book Farm City, and I couldn’t remember if her mail-order poultry had come with instructions. Then, I found out that the USDA recently started a public education campaign on backyard bird health. And, urban homesteaders swap chicken husbandry tips thanks to internet sites like Meetup. There are whole communities out there, dedicated to raising healthy birds.

Still, I am not ready build a coop on my back porch and fill it with chickens. But the salmonella outbreak and the poultry experts at the Eat Real Festival reminded me that farmers, with their great knowledge of how animals and diseases and the environment are all entwined, are the world’s original ecologists.

To learn more about eggs and the differences between supermarket eggs or farm fresh eggs, watch City Egg, Country Egg on QUEST.

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Often at the California Academy of Sciences, you will see docents out on the floor of the museum with an example from our live animal collection.

You've probably heard of this bacteria before, as an unpleasant bug that sometimes finds its way into high-protein foods such as meat, fish, and eggs. It is also naturally found on and in many reptiles, and does not usually make the animals sick, but if passed to humans– particularly young children, the elderly and infirm — it can cause a serious infection called Salmonellosis.

But selecting the right anti-microbial was not as easy a choice as we thought it would be.

Food and Drug Administration published reports question the use of antibacterial soap and hand sanitizers, saying that it found no medical studies that showed a link between a specific consumer antibacterial product and a decline in infection rates. Plus, regular soap kills 90% of bacteria and leaves little impact on the environment.

Additionally, anti-bacterial products like Purell use synthetic polymers known as Triclocarban and triclosan to kill off bacteria. Triclosan is known to promote the growth of resistant bacteria, including E. coli, and both pose environmental toxicity risks; after washing your hands or washing the dishes they can get into the waste water system. Because they do not break down or get filtered out during waste water treatment, up to 75 percent of the original amount gets into the Bay. Once in the environment, these products have been known to disrupt the health of marine life and other wildlife.

So Academy scientists went in search of an alternative product that does not contain the above 2 agents, and has recommended Vionex Antimicrobial Soap for our public programs. Commonly used in the medical, dental, and law enforcement industries, Vionex uses a different antimicrobial agent called PCMX, or parachlorometaxylenol, which is considered significantly less toxic to humans and other mammals that Triclocarban and Triclosan.

What you can do at home

Even if you are not handling reptiles daily like we are, you can take action to reduce exposure to toxic anti-microbials. Whenever possible avoid products that are labeled “anti-bacterial.” Products that are likely to be anti-bacterial are most hand-sanitizers, hand wipes, cleaning products, and dishwasher detergent. If you must use hand-sanitizers, consider natural ones such as Hand-Sanz (found at Whole Food or Bristol Farms).

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