Subject(s)
Arthropod Vectors , Crustacea , Specimen Handling/instrumentation , Animals , Dracunculus NematodeSubject(s)
Antibodies/analysis , Malaria/immunology , Adolescent , Adult , Age Factors , Child , Child, Preschool , Female , Hemagglutination Tests , Humans , Infant , Infant, Newborn , Male , Middle Aged , Plasmodium vivax/immunologyABSTRACT
The transport and storage facilities and the potency of oral poliovirus vaccines currently administered in 108 centres in India were investigated. Storage and distribution practices in many of the centres were far from ideal. There was no significant loss of potency in the vaccine samples collected from a few centres, while samples from other centres showed a 60-99% loss of virus particles per dose. A national monitoring system has since been established to check the potency of every batch of oral poliovirus vaccine imported and to streamline the transport, storage, and administration of the vaccine. Constant vigilance as regards the quality of vaccines should ensure the success of any poliomyelitis immunization campaign.
Subject(s)
Poliovirus Vaccine, Oral/standards , Evaluation Studies as Topic , India , Poliovirus/isolation & purificationABSTRACT
DDE and the o,p' and p,p' isomers of DDT were assayed in 94 human biopsy fat samples from hospitals in Delhi by gas chromatography. DDT was present in all except 2 samples at concentrations from 0.17 to 176.5 mg per kg of body fat. The average total DDT content was 21.8+/-2.9 mg/kg, of which 45.9% was DDE. The average value reported in a similar study in 1965 (24.3 mg/kg, of which DDE constituted 39.7%) was not significantly different from the present value, indicating that the DDT storage status has not since undergone any significant change.
