Drs Bass and Snider are correct. Isoniazid prophylaxis is recommended for all infected persons under 35 years of age and for infected persons over 35 years of age with special risk factors.The American Thoracic Society and the Centers for Disease Control statement1 should be consulted for further details. I apologize for the error and thank Drs Bass and Snider for bringing it to my attention.
LaForce FM. Isoniazid Prophylaxis-Reply. JAMA. 1987;258(7):911. doi:10.1001/jama.1987.03400070048026