CAUSATIVE ORGANISM 



443 



them from growing. In the latter case the germs are still alive 

 and will become active again, whenever the resistance is weakened 



r 



REGIONAL INCIDENCE OF TUBERCULOSIS MORTALITY 

 IN THE UNITED STATES 



Adjusted* Deathretes per JOO.OOO. Tuberculosis -dll forms. 1922 



WHITE POPULATION* 



Stato 



COlOOADO 



CALIFODNIA 



TENNESSEE 



KENTUCKY 



DElAWAHE 



MARYLAND 



NEW YORK 



RHODE ISLAND 



VIRGINIA 



NEW JERSEY 



MISSOURI 



CONNECTICUT 



MASSACHUSETTS 



VEPMOr^T 



PENNSYLVANIA 



NEW HAMPSHIRE 



INDIANA 



OHIO 



MAINE 



lUINOlS 



NORTH CAROUNA 



WASHING ION 



LOUISIAM 



WISCONSIN 



SATE— 



WHITE POPULATION** 



Siate Rate 



OREGON 686 



MINNESOTA 680 



MICHIGAN 66 5 



FLORIDA 64,3 



MOfUANA 59,0 



SOUTH CAROUNA 55,1 



MISSISSIPPI 54 5 



KANSAS 4? 9 



UTAH 42 9 



NEBRASKA 36.1 



KATE-* J9 100 ISO joa iSO iOO 



COLORED POPULATION 



State 



TENNESSEE 



KENTUCKY 



MARYLAND 



VIRGINIA 



LOUISIANA 



NORTH CAROLINA 



SOUTH CAROUNA 



MISSISSIPPI 



FLORIDA 



200 UO 300 



• Pates adjusted for differences of sex and aie constitutior> of population. 



** Includes States with populations containing numl>er or proportion of colored 

 persons insufUcieni to warrant separate tabulation. 



Make a graph from the latest figures of your own and neighboring states and compare it 

 with this chart. Give the possible reasons for a high mortality among the colored population. 



(From Health and Wealth by Dublin, Harper & Bros.) 



by infection, malnutrition, overwork, and fatigue. Data concern- 

 ing the prevalence of tuberculosis in childhood and the subsequent 

 recovery of the children from it is known, because investigation 

 proves that the lungs in practically every dead body examined 

 and the X-rays of li^dng lungs show old scar tissue. The scar tis- 

 sue is characteristic of tuberculosis attacks. Bacilli that get into 

 the blood are frequently carried to a lymph gland, where white 

 corpuscles in great numbers attack and destroy them. The body, 

 meanwhile, builds a hard wall of lime salts around the infected 

 gland, so that the infection is thus removed from the circulation. 

 Sometimes infected glands are cut out to prevent the spread of 

 the germs. Tuberculosis is not hereditary, but susceptibility to 



