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.
Hello. If the food is contaminated, he will mostly develop symptoms very soon. There is a small number of people that have no symptoms at all. Usually, those symptoms appear within 48 hours after suspicious food consuming. It can be even after half an hour. On the other hand, there are even cases that needed a whole week for symptoms to develop. It all depends which bacterium or virus caused it. The condition of organism is also important. I hope your brother will not have any symptoms.