Streptomycin is also occasionally used to treat infections such as brucellosis and endocarditis. As for TB, when treating these infections, streptomycin should be used in combination with another antibiotic to help prevent resistance occuring.
DEFINITION of 'Oil Shale'. A type of sedimentary rock composed chiefly of a combination of silt and clay. Shale may contain kerogen, a type of organic matter that yields oil and gas.
Crude oil is an example of petroleum, which consists of mixtures of hydrocarbons and variable amounts of sulfur, nitrogen, and oxygen containing compounds. In contrast to crude oil, Shale oil is a non-petroleum fuel, which naturally exist in a solid state as an oil shale rock or kerogen.