If you are looking for a specific microorganism, there are probably a whole host of spoilage organisms that can spoil gumbo. Bacteria and yeasts are probably the front runners.
Seafood spoils When you don't cool it down after you take it off the stove.
You can let it cool off out of the refrigerator. I would refrigerate it as soon as it stops giving off steam. Better to refrigerate too early than too late.
keep it cool
The most popular varieties of seafood gumbo are Cajun Seafood Gumbo, Chicken and Sausage Gumbo, Shrimp & Crab Gumbo, Mardi Gras Gumbo and Creole Gumbo.
Yes, there are many recipes that include soy sauce. On Food Network, the Savannah Seafood Gumbo recipe and Nana's Chicken Seafood Gumbo both have soy sauce in their recipes.
You could go to http://www.wantsumeauxgumbeaux.com and send Susan an e-mail. She might be interested in making her award winning gumbo, freezing it, and sending it to you.
a spicy chicken or seafood soup thickened typically with okra or rice.
Milk from spoiling
I've had a couple of huge pots of Gumbo spoil on me because (1st time) I left it out over night (2nd time) I though I refrigerated it too fast, while it was still hot.You tell it's spoil when the soup is all bubbly with a foam like film and has a tainted smell/taste.Here's what I found out at ehow:Store your gumbo immediately after you're done cooking. For short-term storage, the gumbo can go in an airtight plastic container in the refrigerator. Seafood gumbo will last at most three or four days in the refrigerator. Keep the container at the bottom of the refrigerator, where it's coolest.2 Check the thermometer in the refrigerator, and ensure that the temperature is 40 degrees Fahrenheit or below. The freezer should be at least 0 degrees Fahrenheit.3 Freeze your gumbo to store it for longer periods. Put it in a sealable freezer bag, squeeze out the air and seal the bag before placing in the freezer. If you don't need to defrost it all at once, freeze smaller portions in several bags.4 Defrost your gumbo before eating it by transferring it from the freezer to the refrigerator, or letting it sit in a sealed bag in a bowl of cold water. Change the water every half an hour. Reheat your gumbo and eat it immediately after it finishes defrosting.Read more: How to Prevent Gumbo From Spoiling | eHow.com http://www.ehow.com/how_7295611_prevent-gumbo-spoiling.html#ixzz1c9YGHtpD
not keeping it refrigerated
Yes, but it shouldn't be used to prevent it from spoiling.
put cinnamon in it. cinnamon is a mold inhibitor
Gumbo is a type of soup originating from Louisiana and is readily recognizable as a popular local dish. The dish contains a combination of chicken and seafood and thickened with a variety of techniques inspired from African, France, or local Native cuisine.
they canned vegetables and some meats
Gumbo can be bitter if you burn the roux. Gumbo should be slow cooked all day to allow the spices and vegetable flavors to meld. The juice may taste bitter at first but will improve over time and after you add you main ingredients, i.e., seafood or chicken and sausage, etc. Do not add file' to the pot. Add it after it is served. A little bit goes a long way. Too much file' will make the gumbo groppy.