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.
Oil shale differs from bitumen-impregnated rocks (oil sands and petroleum reservoir rocks), humic coals and carbonaceous shale. While oil sands do originate from the biodegradation of oil, heat and pressure have not (yet) transformed the kerogen in oil shale into petroleum, that means that its maturation does not exceed early mesocatagenetic.