Abstract
While the incidence of polio has declined steadily in the rest of the United States since 1966, the incidence of polio in Texas has not followed this pattern and almost all these cases have been associated with type 1 poliovirus. In 1970, a total of 38 cases of paralytic disease in children were investigated in Texas, and in 22 Texas residents, type 1 poliovirus infection was confirmed. The majority of these cases occurred in South Texas and the lower Rio Grande Valley. Of the 38 cases investigated, 33 (87%) were children under 2 years of age. Immunization records on 36 cases showed that 35 (97%) had inadequate or no immunization against polio, and all but one of the children were Caucasians of Latin-American descent. Some areas of South Texas are representative of regions of the United States that not only have a high risk of poliomyelitis in infants due to type 1 poliovirus infection, but also present special problems for health personnel in immunizing those at risk. In areas such as these, newborn feedings of type 1 oral polio vaccine is suggested.
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