[Multiresistant Brachyspira hyodysenteriae in a Dutch sow herd].

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Duinhof TF, Dierikx CM, Koene MG, van Bergen MA, Mevius DJ, Veldman KT, van Beers-Schreurs HM, de Winne RT

[Multiresistant Brachyspira hyodysenteriae in a Dutch sow herd].

Tijdschr Diergeneeskd. 2008 Jul 15-Aug 1;133(14-15):604-8.

PubMed ID
18767301 [ View in PubMed
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Abstract

This case study describes the isolation ofa multiresistant strain ofBrachyspira hyodysenteriae in April 2007 in a Dutch sow herd with recurrent diarrhoea. Examination of faecal samples taken from 7-month-old breeding gilts with diarrhoea revealed the presence of resistance against tiamulin, lincomycin, tylosin, doxycycline, and tylvalosin (the active substance in Aivlosin) in four of five samples. Tiamulin resistance has not been reported in The Netherlands before. The repeated use of tiamulin on the affected farm was assumed to be the main cause of the development of resistance to the drug. The farmer was advised to adopt a medication strategy and to implement management practices that would prevent an ongoing cycle of infection on the farm. It is important that the Dutch swine industry appreciates that tiamulin-resistant strains of B. hyodysenteriae may be found on other farms as well. The appropriate and prudent use of antibiotics is essential in order to prevent the development of resistance against the last option left to cure B. hyodysenteriae infections: valnemulin.

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