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Of 13 field isolates of Pasteurella from chickens and ducks in Indonesia, 10 were confirmed as P. multocida subspecies multocida, one as P. multocida subspecies gallicida and one as P. multocida subspecies septica. Nine were capsular Type A four were Serotype 1, one was Serotype 4, one was Serotype 11, one was Serotypes 4,12, and the remaining six were untypable. Five isolates were pathogenic for mice and two were pathogenic for chickens. Both a trivalent vaccine which included local field isolates and an imported commercial vaccine, were efficacious in layer chickens against challenge with virulent reference and local field strains. Though not statistically significant, the protection provided by the trivalent vaccine against virulent field isolate challenge was slightly better and could provide an improvement over the currently used imported vaccine although further field trials are required. A bacterin vaccine produced from a Serotype 1 field isolate grown in the allantoic sac of embryonated chicken eggs provided chickens with good cross protection against heterologous serotype challenge.

A survey was undertaken in piggeries in the Bogor and Jakarta Capital Territory areas to identify the antigens associated with enterotoxigenic Escherichia coli (E. coli). Rectal swab samples were collected from 65 normal piglets and from 858 with diarrhoea. Fimbrial and O-antigens were determined by agglutination tests. The 987P antigen was only associated with non-haemolygic E. coli in colonies grown for 3-10 days in tryptic soy broth. Organisms which possessed 987P antigen were isolated from 56.4% of piglets with diarrhoea and from 10.8% of normal piglets. Most cases of diarrhoea that were associated with E. coli 987P occurred within the first 3 weeks of life. Multiple infections occurred in 13.4% of cases and were associated with E. coli K88 in eight cases (1.7%) K99 in 26 cases (5.4%) and F41 in 31 cases (6.4%). Of 959 isolates of E. coli 987P, 80.7% were O-group 20, 13% were O-group 9 and 0.5% were O-group 141 with 5.7% being non-typable. Heat stable toxin was produced by all five E. coli 987P isolates tested.