LÉLU, M.; LANGLAIS, Michel; POULLE, Marie-Lazarine; GILOT-FROMONT, Emmanuelle

doi:10.1016/j.tpb.2010.05.005

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LÉLU, M.
Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 [LBBE]
Centre de Recherche et de Formation en Eco-éthologie [2C2A-CERFE]

LANGLAIS, Michel
Institut de Mathématiques de Bordeaux [IMB]
Tools of automatic control for scientific computing, Models and Methods in Biomathematics [ANUBIS]

POULLE, Marie-Lazarine
Protozooses Transmises par l'Alimentation (Cryptosporidiose, Giardose et Toxoplasmose) : Mode de Contamination et Pathogénie (PROTAL) - EA 3800 [PROTAL]

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Theoretical Population Biology. 2010, vol. 78, p. 139-147

Elsevier

Résumé en anglais

Recently, several authors proposed that the availability of intermediate hosts (IH) for definitive hosts (DH) may contribute to determine the dynamics and evolutionary ecology of parasites with facultative complex life cycles. The protozoa Toxoplasma gondii may be transmitted either through complex life cycle (CLC) or through simple life cycle (SLC) and is present in contrasting host density environments. We tested the hypothesis that the relative contributions of CLC and SLC along an urban-rural gradient depend on the IH supply. We built and analyzed a deterministic model of T. gondii transmission cycle. SLC relative contribution is important only in urban-type environments, i.e., with low predation rate on IH. In contrast, the parasite is predominantly transmitted through CLC in suburban and rural environments. The association of the two cycles enables the parasite to spread in situations of low IH availability and low DH population size for which each cycle alone is insufficient.< Réduire

Mots clés en anglais

complex life cycle

simple life cycle

toxoplasmosis

trophic transmission

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Transmission dynamics of Toxoplasma gondii along an urban–rural gradient

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Résumé en anglais

Mots clés en anglais

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