Infected animals often have no symptoms.
Some plant symptoms caused by bacteria include watersoaking, bacterial lesions, bacterial spots and bacterial streaming.
Symptoms of listeria infection can appear within a few days to a few weeks after being contaminated with the bacteria. In some cases, symptoms can take up to 70 days to develop, depending on the individual's immune system and the amount of bacteria ingested.
drug resistant bacteria
Inflicted by toxins
Because the way antibiotics treat those symptoms is by killing the bacteria that cause them. If the symptoms are caused by viruses, then antibiotics can't help since they are not made to be able to "kill" viruses, just bacteria. Flu viruses are not really living organisms like bacteria are. So viruses must be inactivated rather than killed. Antibiotics can neither kill nor inactivate viruses. They are created to be used to kill only specific bacteria, they do not kill every kind of bacteria, either. That is why there are so many different kinds of antibiotics. Antibiotics can treat flu-like symptoms caused by some bacteria, because the right antibiotics can kill bacteria. So although flu like symptoms are similar to those of the flu, they are caused by different microbes so are not cured in the same way.
Actually, you are eating bacteria with every meal that won't make you sick. If you are concerned about symptoms from eating pathogenic bacteria, they will vary depending upon the microbe and the individual who consumed them. FDA's Bad Bug book has a very good chart listing the symptoms and onset times. Some symptoms of various foodborne illnesses include cramping, nausea, vomiting, bloating, diarrhea, bloody stools, fever, headache, rashes, and prostration.
Many bacteria and viruses need time to multiply before any signs and symptoms can be seen.
Incubation
Symptoms of Leptospira infection occur within 7-12 days following exposure to the bacteria. Because the symptoms can be nonspecific, most people who have antibodies to Leptospira do not remember having had an illness.
Those can be symptoms of a urinary tract infection and a doctor should be consulted to find out if that is the problem or something else is causing those symptoms.
The severity of symptoms is variable, ranging from only mild fever to dehydration and rarely death (mainly in the very young or old).