Any sanitarium, medical laboratories or institutional employee of the state or of any county or other subdivision of the state, or any duly licensed nurse employed by the state or by any county, city, nursing district or other subdivision of the state, whose duties in connection with such employment bring or have brought the employee or nurse in contact with patients or persons who are afflicted with tuberculosis, or with tuberculosis contaminated material, who contracts tuberculosis, shall be entitled to the medical care and compensation provided by sections 251.041 to 251.044. “Contracts tuberculosis” shall be construed to mean the development of demonstrable lesions of tuberculosis or the demonstration of the germs of tuberculosis in that person‘s secretions or excretions.