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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Characterization and diversity of Babesia sp. YLG, a new member of the Peircei group infecting Mediterranean yellow-legged gulls (Larus michahellis) (2021)
Auteurs :	Claire Bonsergent, Auteur ; Marion Vittecoq, Auteur ; Carole Leray, Auteur ; Louisiane Burkart, Auteur ; Karen D. McCoy, Auteur ; Laurence Malandrin, Auteur
Type de document :	Article
Dans :	Ticks and Tick-borne Diseases (Online October, 2021)
Article en page(s) :	101852
Langues:	Anglais
Mots-clés :	TdV ; France ; Mer Méditerranée ; Larus argentatus michahellis ; Jeune ; Parasitisme ; Ixodida ; Transmission maladie
Résumé :	Avian infecting piroplasms are largely under-studied compared to other hemoparasites, and this paucity of information has blurred our phylogenetic and biological comprehension of this important group as a whole. In the present study, we detected and characterized Babesia from yellow-legged gull (Larus michahellis) chicks from a colony in southern France. Based on morphological and molecular characterizations, a new Babesia species belonging to the Peircei group, a clade of avian-specific piroplasms, was identified. Due to the complexity of species delineations and the low number of parasites characterized in this clade to date, a species name was not yet attributed; we refer to it for now as Babesia sp. YLG (Yellow-Legged Gull). High prevalence (85% and 58% in 2019 and 2020, respectively) and high parasitemia (up to 20% of parasitized erythrocytes) were recorded in chicks, without any obvious clinical signs of infection. Although the 16 isolates had identical 18S rRNA gene sequences, 6 genetic variants were described based on partial cox1 sequencing, with evidence of chicks co-infected by two variants. Transmission of Babesia sp. YLG via the soft tick Ornithodoros maritimus is discussed.
En ligne :	https://www.sciencedirect.com/science/article/pii/S1877959X21002053

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