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  • Title: Amblyomma americanum (L): tick macrophage migration inhibitory factor peptide immunization lengthens lone star tick feeding intervals in vivo.
    Author: Jaworski DC, Bowen CJ, Wasala NB.
    Journal: Exp Parasitol; 2009 Apr; 121(4):384-7. PubMed ID: 19111543.
    Abstract:
    Immunizations of New Zealand White rabbits with specific macrophage migration inhibitory factor (MIF) tick peptide (PEP) produced circulating anti-tick PEP antibodies in the hosts. Antibody titers of greater than 1:5000 to tick MIF peptide were observed for crude sera from PEP-immunized rabbits. PEP- and BSA-vaccinated rabbits were infested with Amblyomma americanum adults. Feeding intervals, female weights, egg masses and percent egg hatch were measured for ticks feeding on control and immunized hosts. Feeding intervals were significantly lengthened to 13.3 days for PEP-vaccinated hosts compared to BSA-vaccinated controls at 12.4 days, while female engorgement weights and egg masses were unchanged. By immunizing hosts using specific tick PEP, we were able to alter the length of time the ticks fed on their hosts.
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