passages.id: split_1_test_1792_passage
passages.type: progene_text
passages.text: A freeze dried preparation of mouse serum in vials coded 97 / 642 containing antibodies to five pertussis antigens [ pertussis toxin ( PT ) , filamentous hemagglutinin ( FHA ) , pertactin ( PRN ) , fimbriae type 2 and 3 ( Fim 2 and 3 ) ] has been assessed for its suitability as an international reference reagent in an international collaborative study by thirteen laboratories in nine countries .