Mixed Antigens
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Double Antigen (DTDA) : It consists of alum precipitated toxoids of tetanus and diphtheria, available in 0.5 ml ampule and 5 ml vial (DUAL ANTIGEN). It is used in children above 5 years and in younger children in place of triple antigen when pertussis vaccine is contraindicated.
MIXED ANTIGENS
Double Antigen (DTDA)
It consists of alum precipitated toxoids
of tetanus and diphtheria, available in 0.5 ml ampule and 5 ml vial (DUAL ANTIGEN). It is used in
children above 5 years and in younger children in place of triple
antigen when pertussis vaccine is contraindicated.
Dose: 0.5 ml i.m.
Triple Antigen (DPT)
It is a mixture of toxoids of tetanus and
diphtheria with pertussis vaccine (TRIPVAC: Diphtheria toxoid 25 Lf, tetanus toxoid 5 Lf, B. pertussis 20,000 million in 0.5 ml amp; also 10 ml multidose
vial).
It is the preparation of choice for primary active immunization
against the 3 diseases in children below 5 years age. Dose–0.5 ml i.m. in the anterolateral aspect of mid thigh or right
deltoid, 2–3 injections 4–8 weeks apart, between 3–9 months age and one at 18
months. Reactions, precautions and contraindications mentioned under the
individual vaccines apply to triple antigen as well.
A routine immunization schedule for infants and children is
given in the box above.
