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Blood Studies on Trichuris-Infested and Worm-Free Children in Louisiana¹

The blood picture was studied in 550 rural white children 5 to 14 years old in south-central Louisiana. Of these 197 were infected with trichuris; 140 with trichuris and some other intestinal worm, usually ascaris; and 213 were worm-free. The blood picture was essentially the same in all groups, i.e., 11.22 to 11.52 grams hemoglobin per 100 cc. blood; 4.5 to 5.0 million erythrocytes per cmm. blood; mean corpuscular hemoglobin of 23.0 to 23.7 micro micrograms; and a relative lymphocytosis of 46.4 to 47.2 per cent. These children are known to suffer from undernourishment and it is suggested that most of them both parasitized and worm-free, suffer from a nutritional anemia. There is no evidence that the blood picture is effected by the trichuris infestation.

Received May 20, 1935.
¹ These studies were made with the active coöperation and assistance of Drs. B. L. Stinson and L. R. Craig, Parish health officers of Iberia and St. Mary's Parishes, to whom the writer is greatly indebted. The writer is further indebted to Dr. M. M. Wintrobe for suggestions and Drs. Frances A. Coventry and A. H. Hurd for assistance in the hematological aspects of the work.