“…In practice reinfection is frequently reported in apparently well constructed cans with high quality double seams and side seams which cannot be shown to leak by any of the traditional test methods. Many cases of food poisoning are associated in the literature with postprocess reinfection of canned foods, and these cases include typhoid and staphylococcal food poisoning and intoxication due to Clostridium botulinum (Pawan & Scheult, 1934; Shaw, 1937; Ministry of Health, 1938a, b, 1956a, b, 1957aPeters & Clutterbuck, 1942;Miller, 1948; Moore, 1949; Bradley, Evans & Taylor, 1951; Wildman, Grant Nicol & Tee, 1951; Sandiford, 1954; Heppe, 1955; Couper, Newell & Payne, 1956; Goret & Joubert, 1958; Orthel, 1958; Dickinson, 1959; Bashford, Gillespy & Tomlinson, 1960 Tomlinson, 1965;Walker, 1965;Ingram & Roberts, 1966;Oskain & Winter, 1966;Burnett & Davies, 1967;Galbraith, 1967;Howie, 1968). Reports hare also appeared on the economic losses of canned food products as a consequence of reinfection by nonpathogenic bacteria (Sanders, 1949 ;Cockburn, 1960;Shapton & Hindes, 1962;Roskis & Noyelle, 1963;Bashford & Herbert, 1965; Everton, Bean & Bashford, 1968;Bean & Everton, 1969).…”