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Infection and Immunity, July 2001, p. 4657-4660, Vol. 69, No. 7
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.7.4657-4660.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Variation in the Infectivity of Listeria monocytogenes Isolates following Intragastric Inoculation of Mice

Angela H. Barbour,1,* Anita Rampling,2,dagger and Carlos E. Hormaeche1,Dagger

Department of Pathology, University of Cambridge,1 and Public Health Laboratory, Addenbrooke's Hospital,2 Cambridge, England

Received 3 January 2001/Returned for modification 29 January 2001/Accepted 29 March 2001

The infectivities of 66 Listeria monocytogenes isolates were assessed by intragastric inoculation of mice. Eight were poorly infective. Serovars 4b and 1/2 were more infective than serovars 3 and 4nonb. A noninfective isolate was cleared more rapidly from the cecum than were infective isolates, suggesting that survival in the gut may relate to infectivity.

* Corresponding author. Present address: Department of Pathology, Adelaide University, Adelaide, South Australia 5005, Australia. Phone: 61 8 8303 5390. Fax: 61 8 8303 4408. E-mail: angela.barbour{at}adelaide.edu.au.

dagger Present address: Public Health Laboratory, Department of Pathology, Dorset County Hospital, Dorchester, Dorset DT1 2JY, England.

Dagger Present address: Department of Microbiology and Immunology, Medical School, University of Newcastle, Newcastle upon Tyne NE2 4HH, England.

Infection and Immunity, July 2001, p. 4657-4660, Vol. 69, No. 7
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.7.4657-4660.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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