Modern surgery, general and operative . r gave us the term educated corpuscle. Leukocytosis.—In a number of infectious and inflammatory diseases leuko-cytosis occurs. By this term we mean a notable increase of leukocytes in the blood,the polynuclear neutrophiles being increased relatively and absolutely. Leuko-cytosis in an infection indicates that the body is trying to protect itself againstpoisons by furnishing more phagocytes to attack bacteria. The degree ofthe leukocytosis is a sort of gauge of the virulence of the infection and of thereacting or resisting powers of the individual. In a v
Modern surgery, general and operative . r gave us the term educated corpuscle. Leukocytosis.—In a number of infectious and inflammatory diseases leuko-cytosis occurs. By this term we mean a notable increase of leukocytes in the blood,the polynuclear neutrophiles being increased relatively and absolutely. Leuko-cytosis in an infection indicates that the body is trying to protect itself againstpoisons by furnishing more phagocytes to attack bacteria. The degree ofthe leukocytosis is a sort of gauge of the virulence of the infection and of thereacting or resisting powers of the individual. In a very trivial infection theremay be a slight leukocytosis or no leukocytosis at all. A violent infection, ifresistance is high, is accompanied by a high degree of leukocytosis; if resist-ance is low, there is a low degree or no leukocytosis at all. In a virulent infection absence of leukocytosis is of unfavorable means that tissue resistance is at an end and that the body cells have ceasedto fight the bacteria. :<.•.•). Fig. 14. if; -Phagocytosis: A, Successful; B, un-successful (Senn). \ ital Resistance 4q Normally, the blood of an adult should contain about 7500 leukocytes From 50 to 60 per cent, of the cells are polynuclear neutrophiles. Ifthe cells number well above 10,000, and if the percentage of polynuclearneutrophiles is increased, the condition is regarded as leukocytosis. In most cases the leukocyte count is below 20,000. Over 20,000 is highleukocytosis. It is very seldom that a count of over 30,000 is obtained (seepage 103). During the first year of life the normal blood contains from 15,000to 20,000 leukocytes to the At ten years of age it should contain 10, an infant or a young child a high count of leukocytes is without signifi-cance unless it is very high or unless a differential count shows a decidedproportional excess of polymorphonuclear cells. In tuberculous lesions theblood picture exhibits lymphocytosis instead of predo
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