1. Modification of the expression of an extracellular virulence factor (cytotoxin) of Clostridium difficile following growth in the presence of clindamycin and vancomycin;Gemmell,1982
2. Effect of certain antibiotics on the formation of cellular antigens and extracellular products of group A streptococci;Gemmell,1978
3. Regulation of protein A biosynthesis in Staphylococcus aureus by certain antibiotics: its effect on phagocytosis by leukocytes;Gemmell;J Antimicrob Chemother,1983
4. The control of toxin and enzyme biosynthesis;Gemmell,1976
5. Studies on the potentiation of phagocytosis of Streptococcus pyogenes with various antibiotics;Gemmell;Drug Exp Clin Res,1982