Trends in fluoroquinolone resistance in Campylobacter

Abstract

Members of the genus Campylobacter remain a leading cause of bacterial gastroenteritis worldwide. Infection is usually self-limiting but in severe cases may require antibiotic treatment. In a recent statement by the World Health Organization (WHO) Campylobacter was named as one of the 12 bacteria that pose the greatest threat to human health because they are resistant to antibiotics. In this mini review we describe recent trends in fluoroquinolone (FQ) (particularly ciprofloxacin) resistance in strains of members of the genus Campylobacter isolated from livestock and clinical samples from several countries. Using evidence from phenotyping surveys and putative resistance prediction from DNA sequence data, we discuss the acquisition and spread of FQ resistance and the role of horizontal gene transfer and describe trends in FQ-resistance in samples from livestock and clinical cases. This review emphasises that FQ resistance remains common among isolates of members of the genus Campylobacter from various sources.

Keywords: Campylobacter; ciprofloxacin; fluoroquinolones; resistance.

Fig. 1.

Proportion of genomes of isolates of members of the genus Campylobacter containing putative ciprofloxacin resistance. Isolate genomes that contained a complete gyrA gene sequence from 1038 human (Blue), 670 chicken (Orange) and 136 ruminant (Grey) samples collected from 1978 to 2017 were compared. (a) The percentage of isolates containing isoleucine at amino acid position 86 was determined and (b) the total number of samples was recorded.