[A report of four cases considered as caused by exogenous reinfection. Part 3. A report of case 4, and relationship between cases 2, 3 and 4].
D000368:Aged; D003428:Cross Infection; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013183:Sputum / Q000382:microbiology; D014397:Tuberculosis, Pulmonary / Q000635:transmission*