First identification of Cryptosporidium parvum virus 1 (CSpV1) in various subtypes of Cryptosporidium parvum from humans and diarrheic calves, lambs and goat kids in France
2025
Adjou, Karim | Chevillot, A | Blanchard, Yannick | Lucas, Pierrick | Louifi, Houria | Arab, Razika | Mammeri, Mohamed | Thomas, Myriam | Polack, Bruno | Karadjian, Grégory | Costa, Damien | Favennec, Loïc | Dheilly, Nolwenn, M. | Biologie moléculaire et immunologie parasitaires et fongiques (BIPAR) ; École nationale vétérinaire d'Alfort (ENVA)-Laboratoire de santé animale, sites de Maisons-Alfort et de Normandie ; Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)-Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Biologie moléculaire et immunologie parasitaires et fongiques (BIPAR) ; École nationale vétérinaire d'Alfort (ENVA)-Institut National de la Recherche Agronomique (INRA)-Laboratoire de santé animale, sites de Maisons-Alfort et de Normandie ; Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)-Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | Laboratoire de Ploufragan-Plouzané-Niort [ANSES] ; Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES) | Biopôle Alfort ; École nationale vétérinaire d'Alfort (ENVA) | Université de Rouen Normandie (UNIROUEN) ; Normandie Université (NU) | Département de Microbiologie [CHU Rouen] ; CHU Rouen ; Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN) ; Normandie Université (NU) | UNIROUEN - UFR Santé (UNIROUEN UFR Santé) ; Université de Rouen Normandie (UNIROUEN) ; Normandie Université (NU)-Normandie Université (NU) | Institut Pasteur [Paris] (IP) | Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES) | Melbourne University
International audience
Show more [+] Less [-]English. Cryptosporidium spp. remain a major cause of waterborne diarrhea and illness in developing countries and represent a significant burden to farmers worldwide. Cryptosporidium parvum virus 1 (CSpV1), of the genus Cryspovirus, was first reported to be present in the cytoplasm of C. parvum in 1997. Full-length genome sequences have been obtained from C. parvum from Iowa (Iowa), Kansas (KSU) and China. We aimed at characterizing the genome of CSpV1 from France and used sequence analysis from Cryptosporidium isolates to explore whether CSpV1 genome diversity varies over time, with geographical sampling location, with C. parvum genetic diversity, or with ruminant host species. A total of 123 fecal samples of cattle, sheep and goats were collected from 17 different French departments (57 diseased animal fecal samples and 66 healthy animal fecal samples). Subtyping analysis of the C. parvum isolates revealed the presence of two zoonotic subtypes families IIa and IId. Sequence analysis of CSpV1 revealed that all CSpV1 from France, regardless of the subtype of C. parvum (IIaA15G2R1, IIaA17G2R1 and IIdA18G1R1) are more closely related to CSpV1 from Turkey, and cluster on a distinct branch from CSpV1 collected from C. parvum subtype IIaA15G2R1 from Asia and North America. We also found that samples collected on a given year or successive years in given location are more likely to host the same subtype of C. parvum and the same CSpV1 strain. Yet, there is no distinct clustering of CSpV1 per French department or ruminants, probably due to trade, and transmission of C. parvum among host species. All together, these results provide insightful information regarding CSpV1 evolution and suggest the virus might be used as an epidemiological tracer for C. parvum. Future studies need to investigate CSpV1 role in C. parvum virulence and on subtype ability to infect different species.
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