“…cures with single or double dosage (Willcox, 1958) Acid-resistant Synthesized after discovery of economic source of 6-amino-penicillanic acid in fermentation broths (Batchelor, Doyle, Nayler, and Rolinson, 1959) Excellent results with 3-4 g. over 2 days (Marmell and Prigot, 1961) Indifferent results with single or double doses of 1 g. (Hilton, 1961;Allison, 1962) although 82-85 per cent. cures obtained by others (Jefferiss and Rosedale, 1961;Willcox, 1962a) Acid-resistant, broad spectrum Considered more effective than others against less sensitive strains , but others (Reyn and Bentzon, 1968) consider penicillin G and ampicillin to be equal in effectiveness weight for weight Useful clinically in penicillin G failures (Willcox, 1964a;Smith, 1966) Excellent results with multiple doses (Marmell, Sills, Brown, and Prigot, 1964;Heinemann and Vinikoff, 1965) Failure rate approx. 15 per cent.…”