Infection

, Volume 42, Issue 6, pp 961–970

Gastrointestinal pathogens detected by multiplex nucleic acid amplification testing in stools of pediatric patients and patients returning from the tropics

  • C. Beckmann
  • U. Heininger
  • H. Marti
  • H. H. Hirsch
Clinical and Epidemiological Study

DOI: 10.1007/s15010-014-0656-7

Cite this article as:
Beckmann, C., Heininger, U., Marti, H. et al. Infection (2014) 42: 961. doi:10.1007/s15010-014-0656-7

Abstract

Background

Gastrointestinal infections are caused by a broad spectrum of pathogens. Conventional diagnostic procedures are resource and time consuming due to single pathogen testing, often in different laboratories.

Method

We analyzed 312 consecutive stool samples from pediatric patients (n = 127) with gastroenteritis or from adult travelers returning from the tropics with suspected parasite infestation (n = 185) using commercial multiplex nucleic acid amplification testing (NAT) (xTAG gastrointestinal pathogen panel, Luminex) covering 15 diarrhea-causing pathogens. The results of the positive samples and a representative number of negative samples were compared to standard methods, including NAT, direct antigen detection (DAD), bacterial culture and microscopy.

Results

Of the 185 samples from adult travelers, 21 (11 %) were multiplexNAT-positive, with enterotoxigenic Escherichia coli (4 %) being the predominant pathogen. Microscopic examination revealed Blastocystis hominis in 23 % not covered by the panel. MultiplexNAT scored positive in 66 pediatric samples (52 %), with rotavirus (27 %) being the most prevalent. All adenovirus-, rotavirus-, Clostridium difficile- and Cryptosporidium-positive samples were confirmed in external laboratories, but only 40 % of norovirus- and 29 % of Giardia-positive samples. Analysis of frozen specimens by bacterial culture showed the highest discrepancies with the multiplexNAT.

Conclusion

Our study demonstrates broad detection of relevant gastroenteritis pathogens by multiplexNAT with a short turnaround time. This is important for diagnosis, infection control and empiric management of gastroenteritis patients, but may be selectively complemented by bacterial culture and resistance testing.

Keywords

Gastrointestinal infection Multiplex PCR NAT Stool Diarrhea Parasites Bacteria Virus 

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • C. Beckmann
    • 1
  • U. Heininger
    • 2
  • H. Marti
    • 3
  • H. H. Hirsch
    • 1
    • 4
    • 5
  1. 1.Division of Infection Diagnostics, Department of Biomedicine (Haus Petersplatz)University of BaselBaselSwitzerland
  2. 2.Division of Pediatric Infectious DiseasesUniversity Children’s Hospital BaselBaselSwitzerland
  3. 3.Swiss Tropical and Public Health InstituteUniversity of BaselBaselSwitzerland
  4. 4.Transplantation and Clinical Virology, Department Biomedicine (Haus Petersplatz)University of BaselBaselSwitzerland
  5. 5.Infectious Disease and Hospital EpidemiologyUniversity Hospital BaselBaselSwitzerland