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.
Shale is a pure sedimentary rock made of very fine silt and clay and falls in the category of mud stones. Its grain size is less than 1/256mm. It forms in deep water eg at oceanic trenches where all the suspended material gets settled in the quite waters.