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.
Image of an acrylamide gel 7% showing PCR amplification of the 401-bp fragment (gltA rickettsial gene). C+ = positive control; C- = negative control (distilled water); 1–6 = flea samples (1,2,3,4,6 positives); M = molecular weight (100 bp PCR Molecular Ruler, BioRad, Laboratories Inc., Hercules, CA, USA).
