抄録
I have obtained the following summary by investigating 237 cases.
1. The mean value of red cell count is 5, 210, 000 in healthy suck-lings and 5, 180, 000 per cmm. in healthy children and adults.
2. Anemia occurs in the cases of sucklings nourished with milk negative to Arakawa's reation-B-avitaminotic sucklings.
3. Platelet count is 299, 000 per cmm. in normal sucklings and 251, 000 in healthy adults and children.
4. The average blood platelet count is 291, 363 and 400 thousands according as Arakawa's reaction becomes weaker.
5. Blood platelet count in avitaminosis B is 477 thousands and this is larger than that of Arakawa-negative group.
6. In the Horwitz classification of blood platelets, normal limits are from 19% to 24 in small platelets and up to 5 in large plate-lets.
7. The ratio of blood platelets in sucklings 2 months old or under is 27.9:68.6:3.5. Both counts of large and small platelets are larger than in older sucklings.
8. The ratio of large platelets is 1:2:3 in percentage and 1:3.7:5 in absolute count according as Arakawa's reaction becomes weaker.
9. In the beginning of B-avitaminosis, blood platelet count shows a slight rise with an increase of small platelets, in the next stage platelet count becomes larger and at the same time large platelets begin to increase and in the manifest stage of avitaminosis B an increase of large platelets becomes remarkable besides the above mentioned chan-ges.
10. Sucklings nourished with human milk negative to Araka-wa's reaction are more or less inclined to a state of B-avitaminosis.
11. It is important to examine not only the platelet count but also its classification in avitaminosis B for the purpose of diagnosis and treatment.
