The actual term Expiration Date refers to the last date a food should be eaten or used. Last means last -- proceed at your own risk. Other, more commonly spotted terms are:  1 Sell by date. 2  The labeling sell by tells the store how long to display the product for sale. 3  You should buy the product before the date expires. 4  This is basically a guide for the retailer, so the store knows when to pull the item.
Rats can carry fleas that may be infected with the bacteria that cause bubonic plague. Headaches are common in people with bubonic plague. Bubonic plague manifests in the form of swollen lymph nodes. Bubonic Plague causes large bruises to appear. Exposure to infected rodents like the prairie dog can cause transmission of the bubonic plague.
Once infected, bubonic plague causes such symptoms as headaches, fever, and swollen, tender lymph glands. Bubonic plague is the most common form of plague. Bubonic plague is caused by Yersinia pestis, also known as plague bacteria.This bacteria also causes the other two forms of plague: septicemic plague and pneumonic plague (see Types of Plague) .ubonic Plague Causes: Yersinia Pestis. Yersinia pestis are Gram-negative bacteria found in certain parts of the world, primarily Africa, Asia, and South America.