Many people think that a yellow or green nasal discharge means a bacterial infection, which requires antibiotics but it is not true. It can be a sign that your body is being attacked by either a bacteria or a virus. That said, a yellow discharge does not necessarily indicate a sinus infection.
After the stool is placed in the culture, it may take two to three days for any bacteria that is in the stool to grow. These bacteria can then be isolated and examined under a microscope so that they may be identified. The stool may also be tested for parasites or eggs.
The answer to how long does food poisoning last and how long does it take for symptoms to show also depends upon where the poison came from. If the tainted food contained staph, the symptoms can begin within one hour of eating. If the problem came from campylobacter, the symptoms might not show up for 10 days or more.