A Composite Recombinant Salivary Proteins Biomarker for Phlebotomus argentipes Provides a Surveillance Tool Postelimination of Visceral Leishmaniasis in India

Eva Iniguez, Samiran Saha, Georgios Petrellis, Claudio Menenses, Samantha Herbert, Yvonne Gonzalez-Rangel, Tobin Rowland, Naomi E. Aronson, Clair Rose, Lee Rafuse Haines, Alvaro Acosta-Serrano, Tiago D. Serafim, Fabiano Oliveira, Sridhar Srikantiah, Caryn Bern, Jesus G. Valenzuela, Shaden Kamhawi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Incidence of visceral leishmaniasis (VL) in the Indian subcontinent (ISC) has declined by more than 95% since initiation of the elimination program in 2005. As the ISC transitions to the postelimination surveillance phase, an accurate measurement of human-vector contact is needed to assure long-term success. To develop this tool, we identified PagSP02 and PagSP06 from saliva of Phlebotomus argentipes, the vector of Leishmania donovani in the ISC, as immunodominant proteins in humans. We also established the absence of cross-reactivity with Phlebotomus papatasi saliva, the only other human-biting sand fly in the ISC. Importantly, by combining recombinant rPagSP02 and rPagSP06 we achieved greater antibody recognition and specificity than single salivary proteins. The receiver operating characteristics curve for rPagSP02 + rPagSP06 predicts exposure to Ph. argentipes bites with 90% specificity and 87% sensitivity compared to negative control sera (P >.0001). Overall, rPagSP02 + rPagSP06 provides an effective surveillance tool for monitoring vector control efforts after VL elimination.

Original languageEnglish
Pages (from-to)1842-1851
Number of pages10
JournalJournal of Infectious Diseases
Volume226
Issue number10
DOIs
StatePublished - 15 Nov 2022
Externally publishedYes

Keywords

  • India
  • Phlebotomus argentipes
  • biomarker
  • elimination campaign
  • sand fly salivary proteins
  • surveillance
  • visceral leishmaniasis

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