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Salmonella enteritidis phage type 4 from the contents of intact eggs: a study involving naturally infected hens

Published online by Cambridge University Press:  15 May 2009

T. J. Humphrey
Affiliation:
Exeter Public health Laboratory, Church Lane, Heavitree, Exeter, Devon EX2 5AD,
A. Baskerville
Affiliation:
PHLS Centre for Applied Microbiology and Research, Division of Pathology, Porton Down, Salisbury, Wiltshire SP4 OJG,
S. Mawer
Affiliation:
Hull Public Health Laboratory, Hull Royal Infirmary, Anlaby Road, Hull HU3 2JZ,
B. Rowe
Affiliation:
PHLS Division of Enteric Pathogens, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT,
S. Hopper
Affiliation:
MAFF Veterinary Investigation Centre, Riseholme, Lincoln LN2 2LJ
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Summary

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Two small flocks of egg-laying hens, naturally infected with Salmonella enteritidis. were housed in individual cages so that their eggs could be identified. During a longitudinal study where the contents of 1119 eggs were examined, 11 were positive for S. enteritidis. One isolate was phage type (PT) 33 the others were PT4. The production of infected eggs was clustered though intermittent. The positive eggs. which were produced by 10 of the 35 hens, were all found to contain fewer than 10 salmonellas. Some birds were also apparently carrying S. hadar PT14 as this organism was isolated from the contents of six Cracked eggs.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1989

References

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