Now that we know about both prokaryotic and eukaryotic cells, let's look at the endosymbiosis theory. This theory suggests that mitochondria and plastids in eukaryotic cells were once independent prokaryotic cells.
Avian influenza (AI) is an infectious viral disease of birds (especially wild water fowl such as ducks and geese), often causing no apparent signs of illness. AI viruses can sometimes spread to domestic poultry and cause large-scale outbreaks of serious disease.
Diseases and Conditions. What you need to know about Avian Influenza There are no Avian Influenza cases in the U.S., but there are questions about the virus (also known as bird flu and H5N2). The answers to these frequently asked questions can help. Salmonella Salmonella is a bacterial infection spread by eating or drinking contaminated food or water, or by direct or indirect contact with feces from an infected person or animal. Symptoms include mild to severe diarrhea, stomach pains, fever and occasional vomiting. Salmonella. Salmonella is a bacterial infection spread by eating or drinking contaminated food or water, or by direct or indirect contact with feces from an infected person or animal.