PPD-B

AcronymDefinition
PPD-BPurified Protein Derivative from Mycobacterium Bovis
References in classic literature ?
The next morning he saw Albert pass and repass, holding an enormous bouquet, which he doubtless meant to make the bearer of his amorous epistle.
He sends his myrmidons to come over the fence and pass and repass.
The Victoria thus passed over the country of the Tibbous, crossed the Belad el Djerid, a desert of briers that forms the border of the Soudan, and advanced into the desert of sand streaked with the long tracks of the many caravans that pass and repass there.
As well might the humble glowworm despise that power of giving light without which the roving fly might pass her and repass her a thousand times, and never rest beside her: she might hear her winged darling buzzing over and around her; he vainly seeking her, she longing to be found, but with no power to make her presence known, no voice to call him, no wings to follow his flight;--the fly must seek another mate, the worm must live and die alone.
The dwellers in those quiet tree-lined roads were accustomed to see the two figures, the long, thin, austere seaman, and the short, bustling, tweed-clad physician, pass and repass with such regularity that a stopped clock has been reset by them.