Introduction, B.S.Drasar and B.I.Duerden; classification of anaerobes, B.S.Drasar; characteristics of anaerobic metabolism, J.G.Morris; genetics of anaerobes, N.P.Minton and D.E.Thompson; bacteriodes and fuscobacterium - classification and relationships to other bacteria, H.N.Shah and E.Gharbia; the clostridia, G.Hobbs; anaerobic cocci, B.Watt; the spirochaetes, M.J.Hudson; actinomyces and arachnia, G.H.Bowden; bifidobacteria, A.K.Roberts; anaerobes in the normal flora of man, B.S.Drasar and B.I.Duerden; laboratory diagnosis of anaerobic infection, M.W.D.Wren; abdominal sepsis, A.Trevor Willis; anaerobes in genitourinary infections, B.I.Duerden; dental and oral infection, J.M.Hardie; respiratory, ENT and CNS infections, H.R.Ingham and P.R.Sisson; superficial ulceration and necrosis, B.Adriaans, et al; gas gangrene and clostridial cellulitis, A.Trevor Willis; anaerobic bacteraemia, R.C.Spencer; anaerobes in intestinal homeostasis, S.P.Borriello and F.E.Barclay; anaerobic bacteria in diarrhoea and colitis, S.P.Borriello; clostridium perfringens type A food poisoning, P.R.Berry and R.J.Gilbert; systematic toxigenic diseases (tetanus, botulism), J.G.Collee and S.van Heyningen; metabolic and carcinogenic effects of anaerobes, M.J.Hill; antibiotics and anaerobes, D.Greenwood, et al.