Shigella Detection and Molecular Serotyping With a Customized TaqMan Array Card in the Enterics for Global Health (EFGH): Shigella Surveillance Study

Jie Liu, Paul F. Garcia Bardales, Kamrul Islam, Sheikh Jarju, Jane Juma, Chimwemwe Mhango, Queen Naumanga, Sonia Qureshi, Catherine Sonye, Naveed Ahmed, Fatima Aziz, Md Taufiqur Rahman Bhuiyan, Mary Charles, Nigel A. Cunliffe, Mahamadou Abdou, Sean R. Galagan, Ensa Gitteh, Ibrehima Guindo, M. Jahangir Hossain, Abdoulie M.J. JabangKhuzwayo C. Jere, Flywell Kawonga, Mariama Keita, Noumou Yakhouba Keita, Karen L. Kotloff, Wagner V. Shapiama Lopez, Stephen Munga, Maribel Paredes Olortegui, Richard Omore, Patricia B. Pavlinac, Firdausi Qadri, Farah Naz Qamar, S. M. Azadul Alam Raz, Laura Riziki, Francesca Schiaffino, Suzanne Stroup, Sarata Nassoun Traore, Tackeshy Pinedo Vasquez, Mohammad Tahir Yousafzai, Martin Antonio, Jennifer E. Cornick, Furqan Kabir, Farhana Khanam, Margaret N. Kosek, John Benjamin Ochieng, James A. Platts-Mills, Sharon M. Tennant, Eric R. Houpt

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Background. Quantitative polymerase chain reaction (qPCR) targeting ipaH has been proven to be highly efficient in detecting Shigella in clinical samples compared to culture-based methods, which underestimate Shigella burden by 2- to 3-fold. qPCR assays have also been developed for Shigella speciation and serotyping, which is critical for both vaccine development and evaluation. Methods. The Enterics for Global Health (EFGH) Shigella surveillance study will utilize a customized real-time PCR–based TaqMan Array Card (TAC) interrogating 82 targets, for the detection and differentiation of Shigella spp, Shigella sonnei, Shigella flexneri serotypes, other diarrhea-associated enteropathogens, and antimicrobial resistance (AMR) genes. Total nucleic acid will be extracted from rectal swabs or stool samples, and assayed on TAC. Quantitative analysis will be performed to determine the likely attribution of Shigella and other particular etiologies of diarrhea using the quantification cycle cutoffs derived from previous studies. The qPCR results will be compared to conventional culture, serotyping, and phenotypic susceptibility approaches in EFGH. Conclusions. TAC enables simultaneous detection of diarrheal etiologies, the principal pathogen subtypes, and AMR genes. The high sensitivity of the assay enables more accurate estimation of Shigella-attributed disease burden, which is critical to informing policy and in the design of future clinical trials.

Original languageEnglish
Pages (from-to)S34-S40
JournalOpen Forum Infectious Diseases
Volume11
Issue numberSupplement_1
DOIs
Publication statusPublished - 1 Mar 2024

Keywords

  • ipaH
  • PCR
  • quantification
  • rectal swab
  • serotyping

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