Magnesium - serum
Magnesium - urine
Malaria antigen
Malaria - serology
Measles - IgG/IgM serology
Mercury - blood
Mercury - urine
Mercury - hair specimen
Mercury - saliva
Methyl alcohol
Microalbumin - urine
Mumps - IgG/IgM serology
Mycobacteria - culture
Mycobacteria - direct examination
Mycoplasma pneumoniae - direct diagnosis - PCR
Myoglobin - serum
Myoglobin - urine
