Dorrestein G M, Zwart P, Borst G H, Poelma F G, Buitelaar M N
Tijdschr Diergeneeskd. 1977 Apr 1;102(7):437-47.
In 1975, post-mortem studies were done on 745 birds. The findings are tabulated. The most important problems are evaluated. The most striking finding is the very large proportion (46.0 per cent) of birds which died from infectious disease caused either by bacteria, viruses, protozoa or parasites. Hygiene is stressed as a valuable preventive measure.