an analogue of p-aminobenzoic acid that inhibits folic acid synthesis in Mycobacterium tuberculosis, used in the treatment of tuberculosis, administered orally. In pharmacy it is officially called aminosalicylic acid. It enhances the potency of streptomycin and delays the development of bacilli resistant to streptomycin. Gastrointestinal irritation accompanied by anorexia, nausea, and vomiting may be reduced by administering the drug with food at mealtime.

PAS

1. p-aminosalicylic acid, used at one time in the treatment of tuberculosis in humans; also abbreviated PASA.

2. periodic acid-Schiff reaction (stain).

PAS

1 Periodic acid-Schiff–stain, see there 2. Para-aminosalicylic acid 3. Pulmonary artery stenosis

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acid mucopolysaccharide Affair capacitance capacitation opacification p-aminosalicylic acid para-aminosalicylic acid pas-de-côte pascal passage Pasteurella pasteurellosis pasteurization pastille radiopacity			partridge PARTS parts per million parturient parturient canal parturifacient parturiometer parturition Party Wall Party Wall Appearance parulis parumbilical paruresis paruria parvaquone parvicellular parvo parvoviral Parvoviridae parvovirus parvovirus B19 parvovirus B19 antibody test parvule parvus et tardus Parzam PAS pas-de-côte pascal Pascal's law Pascal's principle Paschen bodies Paschen body Paschen's corpuscles PASE PASG paspalitrems Paspalum paspalum ergot paspalum grass paspalum staggers pasque flower pass pass facilitation passage Passalurus Passavant's bar Passavant's cushion Passavant's pad Passer passer, foil Passeriformes			Parvovirus B19 infection Parvovirus b19, human Parvovirus Enteritis Parvovirus, canine parvoviruses parvoviruses parvoviruses parvule Parvus parvus et tardus PARW PARW/CC PARWC PARWCC Parwill PARWQCP PARWU Paryavaran Avam Gramin Vikas Sansthan Parylene parylene capacitor Paryusana Paryushan Paryushana Parzam Parzifal Parzival PAS Pas Daction pas de basque pas de bourree pas de bourrée Pas de Calais Pas de Calais pas de chat pas de deux pas de deux pas de quatre Pas de Quoi pas de trois pas de trois pas op pas seul pas seuls Pas, the PAS-1 PAS-ADD PAS-C Pas-dammim Pas-de-Calais Pas-de-Calais Pas-de-Calais (department) Pas-de-Calais (department) pas-de-côte pas-de-souris Pas1 PAS2

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