Immunity against @entity116 in an urban population: gaps of immunity among elderly @entity1 . In a sero-epidemiological survey we investigated the immunity against tetanustoxoid in an urban population. @entity1 and adolescents born in Germany (n = 193) showed an excellent immunity, negative findings being the exception. Among soldiers of the army (n = 136), negative findings were rare too. In these both groups the antibody titiers averaged 4,5 IU/ml. It is generally agreed that an antibody titer of 0,01 IU/ml protects against @entity116 . Adults born in Germany (n = 295) had a good immunity: 84% showed antibody - titers against @entity116 . Among elderly @entity1 , however, above 60 years of age (n = 1576) there was a striking incidence of negative findings: in 1043 @entity1 (65%) no antibodies could be detected. The remaining 533 @entity1 with positive findings (35%) had antibody-titers in the lower range (average 0,482 IU/ml). Also among foreigners and immigrant labourers from mediterrean countries (Greece, @entity233 , Yugoslavia) the frequency of negative findings was high: 183 @entity1 were examined, 70 (39%) were negative 113 (61%) were positive. The incidence of negative findings was highest among @entity1 from the mediterrean countries. Several small studies published in Switzerland show a similar tendency. Our paper will encourage further seroepidemiological studies.

[ XXXX immunity in an urban population: gaps in the vaccination of senior citizens and foreign guest workers].

@entity1 :: ('9606', 'Species') :: ['women', 'Children', 'persons'] @entity116 :: ('MESH:D013746', 'Disease') :: ['tetanus'] @entity233 :: ('9103', 'Species') :: ['Turkey']
@entity116 :: (MESH:D013746,Disease) :: ['Tetanus']
