a blocking reagent ( abbott ) was used to test 153 conjunctival and nasopharyngeal samples from children with signs of early trachoma and from neonates and adults with conjunctivitis caused by chlamydia trachomatis in whom positive results had been obtained on at least one occasion in an enzyme immunoassay ( eia ) ( abbott ) .
C0009758
conjunctival
C0009763
conjunctivitis