The diagnosis is confirmed by acquiring acid-speedy bacilli in a biopsy of the skin. Prenatal Diagnosis. 33 (7): 662-6. doi:10.1002/pd.4119. Multilocus sequence typing of the armadillo M. leprae strains suggests that they have been of human origin for at most a number of hundred many years. M. leprae and M. lepromatosis are obligate intracellular pathogens, and can not be grown (cultured) in the laboratory.