Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Antibacterial immune response of X. cheopis fleas induced by bacterial challenge. Zone of inhibition assay of extracts collected from fleas 6 h after challenge by piercing the exoskeleton with either a needle contaminated with E. coli and M. luteus (infected) or a sterile needle (sham) and from unchallenged fleas (uninfected).
