Although most bacteria are harmless or often beneficial, several are pathogenic. One of the bacterial diseases with the highest disease burden is tuberculosis, caused by the bacterium Mycobacterium tuberculosis, which kills about 2 million people a year, mostly in sub-Saharan Africa.athogenic bacteria contribute to other globally important diseases, such as pneumonia, which can be caused by bacteria such as Streptococcus and Pseudomonas, and foodborne illnesses, which can be caused by bacteria such as Shigella, Campylobacter, and Salmonella.
exists and is an alternate of . The brooms are used to sweep the ice in front of a sliding rock. The friction created from sweeping melts the ice just a tiny bit, enough to decrease the friction between the rock and the ice, making the rock both slide farther and slide straighter (curl less).
An ice hockey stick is a piece of equipment used in ice hockey to shoot, pass, and carry the puck. Ice hockey sticks are approximately 150â200 cm long, composed of a long, slender shaft with a flat extension at one end called the blade. The blade is the part of the stick used to contact the puck, and is typically 25 to 40 cm long.