1. Gershanik J J. Neonatal pneumopericardium, Am J Dis Child 1971; 121: 438-9.
2. We agree with Robertson;Sir;et al. (Archives; that perinatal listeriosis may be under reported (or even underdiagnosed) in Britain. This belief is supported by 2 further cases which must have occurred at about the same time in an adjacent health district,1979