calculus. Calculus, which was discovered by Newton and Liebniz, nothwithstanding all credit being given to Newton, is one of the most beautiful forms of intellectual material. Calculus requires and emphasizes the development of new methods of thinking, and therefore it is not for the weak minded.
Bacterial gastroenteritis happens when bacteria causes an infection in your gut. This causes inflammation in your stomach and intestines. You may also experience symptoms like vomiting, severe abdominal cramps, and diarrhea. While viruses cause many gastrointestinal infections, bacterial infections are also common.
Characteristics of Stomach Flu and Food Poisoning. Stomach flu: Stomach flu is caused by the infection of the GI tract, and the symptoms emerge one to two days after exposure to the virus and usually last for one- two days, however, in some cases, can last for up to 10 days.