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Cryptosporidiumparvum oocysts in seawater clams (Chameleagallina) in Italy |
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| Authors: | Giangaspero Annunziata Molini Umberto Iorio Raffaella Traversa Donato Paoletti Barbara Giansante Carla |
| Institution: | aDipartimento di Scienze delle Produzioni, dell’Ingegneria e della Meccanica e dell’Economia Applicate ai Sistemi Agro-Zootecnici, Via Napoli 25, 71100 Foggia, Italy bDipartimento di Scienze Biomediche Comparate, P.zza Aldo Moro 45, 64100 Teramo, Italy cIstituto Zooprofilattico dell’Abruzzo e del Molise, Via Campo Boario, 64100 Teramo, Italy |
| Abstract: | Bivalves filter large volumes of water and can concentrate organisms which are pathogenic for humans and animals. Our aim was to evaluate the presence of Cryptosporidium spp. in clams from the Adriatic coast (Abruzzo region) and genetically characterize the oocysts isolated from the clams. From March to July 2003, 960 specimens of clams (Chamelea gallina) present in nature were collected at 500 m from the Tordino, Tronto, Vibrata and Vomano river mouths on the Adriatic sea. The haemolymph and tissues were extracted from the specimens (240 per river mouth) after the specimens had been identified, measured and weighed (live weight). Immunofluorescence tests (IFA) were performed on pools (n = 32) of samples and oocysts of Cryptosporidium spp. were detected in 23 pools of C. gallina. To identify the Cryptosporidium species, all the pools IFA-positive were tested by a PCR assay specific for the Cryptosporidium outer wall protein (COWP) gene. Positive amplicons then were sequenced and analysed. Two pools of clams were positive for Cryptosporidium parvum Genotype 2 (the “bovine” i.e. zoonotic genotype). This is the first time that C. parvum was found in clams from the Adriatic sea in Italy and the case might be of public health importance. |
| Keywords: | Cryptosporidium parvum Chamelea gallina Epidemiology IFA PCR COWP |
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