Distribution of phylogroups and co-resistance to antimicrobial agents in ampicillin resistant Escherichia coli isolated from healthy humans and from patients with bacteraemia.

A. Haugaard, A. M. Hammerum, Lone Jannok Porsbo, H. Schønheyder, Eliza Maria Bielak, Henrik Hasman

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Abstract

In 2002-03, 31 ampicillin resistant faecal isolates were collected from healthy humans. Moreover, 31 ampicillin resistant blood isolates from patients with bacte-raemia were collected in 2000-02. All isolates were tested positive for the pres-ence of blaTEM. Isolates were characterized by minimum inhibitory concentration to antimicrobial agents and examined by PCR to determine their phylogroups. The phylotyping grouped the faecal samples into A (13%), B1 (10%), B2 (42%), D (19%), NT (16%) while the blood isolates grouped into A (16%), B1 (0%), B2 (48%), D (32%) and NT (3%). The frequency of resistance in faecal and blood isolates (F/B) was: tetracycline (48%/48%), gentamicin (0%/10%), ciprofloxacin (3%,13%), sulfonamide (68%/77%) and trimethoprim (39%/39%). Conclusion: B2 was the most prevalent phylogroup found both in faecal isolates collected from healthy humans and in blood isolates from patients with bacterae-mia, and co-resistance was frequent in isolates from both sources.
Original languageEnglish
Publication date2011
Publication statusPublished - 2011
Event2011 Symposium The Danish Microbiological Society - Copenhagen, Denmark
Duration: 7 Nov 2011 → …

Conference

Conference2011 Symposium The Danish Microbiological Society
CountryDenmark
CityCopenhagen
Period07/11/2011 → …

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