Serial passage in resistant sheep drives the infectivity and fitness of Teladorsagia circumcincta in susceptible lambs: Experimental evidence
2022
Chylinski, Caroline | Schmidt, Enrique | Gruner, Lucas | Cabaret, Jacques | Infectiologie et Santé Publique (ISP) ; Université de Tours (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Scotland's Rural College (SRUC) | Universidad Nacional de lLa Pampa (UNLPam) | SEVENTH FRAMEWORK PROGRAMME, Networks for Initial Training, European Union | Elsevier | European Project: 264639,EC:FP7:PEOPLE,FP7-PEOPLE-2010-ITN,NEMATODESYSTEMHEALTH(2011)
International audience
Afficher plus [+] Moins [-]anglais. Gastrointestinal nematodes (GIN) of small ruminants have adapted their life history strategies to thrive in diverse and fluctuating environments. Environments which alter their expression of life traits may also drive changes in the infection or transmission dynamics, particularly if transferred to a foreign setting. This study aimed to explore how repeated exposure to a resistant sheep host environment would alter the life history traits and infection dynamics of Teladorsagia circumcincta when consequently infected in susceptible lambs. Following just three generations of passage in resistant sheep, T. circumcincta significantly increased their infectivity and fitness in susceptible lambs compared to a control population. This is the first evidence to indicate the resistant host environment can drive such rapid changes in the expression of GIN life traits, with potentially undesirable epidemiological outcomes.
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