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Bonelli P, Serra E, Dei Giudici S, Peruzzu A, Crotti S, Danesi P, Carvelli A, Piseddu T, Masala G. Molecular phylogenetic analysis of Echinococcus granulosus sensu lato infecting sheep in Italy. Acta Trop 2024; 252:107151. [PMID: 38367944 DOI: 10.1016/j.actatropica.2024.107151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/27/2024] [Accepted: 02/15/2024] [Indexed: 02/19/2024]
Abstract
Cystic Echinococcosis (CE), caused by the larval form of Echinococcus granulosus sensu lato, is a neglected zoonosis still threatening public health worldwide. In Italy different epidemiological scenarios were reported depending on the geographical area and associated socio-economic activities. Although in northern Italy the occurrence of E. granulosus is considered sporadic, in the southern regions and, particularly in Sardinia, CE prevalence reaches high levels. We analysed CE cysts collected from infected sheep from various areas of mainland Italy and the Sardinia island, with the main objective to investigate intergenotypic and intragenotypic variations at national level. CE cysts were collected from slaughtered sheep following post mortem inspection at local abattoirs. Total genomic DNA was extracted and amplification and sequencing of the partial mitochondrial genes nad5 and cox1 were performed. A Bayesian phylogenetic tree was estimated on a nad5 dataset (n = 260) composed of E. granulosus samples from this study (n = 126) and all the nad5 haplotypes available in GenBank (n = 134). In addition, haplotype network, diversity and neutrality analysis were performed on nad5 and cox1 sequences of Italian origin obtained in this study. E. granulosus sensu stricto (s.s.) was found to be the only Echinococcus species infecting sheep in Italy, mainly represented by G1 genotype (76 %) and, to a lower extent, by G3 genotype (24 %). Phylogenetic analyses revealed 40 nad5 and 33 cox 1 haplotypes, and the presence of two founder haplotypes, belonging to G1 and G3 genotype, showing 100 % similarity with DNA sequences from different geographic regions. The lack of geographical segregation, high haplotype and low nucleotide diversity coupled with significant negative values of Tajima's D and Fu's Fs observed in this study indicated high genetic variation and demographic expansion of E. granulosus s.s. in Italy.
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Affiliation(s)
- Piero Bonelli
- Istituto Zooprofilattico Sperimentale della Sardegna, WOAH Reference Laboratory for Echinococcosis, National Reference Laboratory of Echinococcosis (CeNRE), Via Vienna 2, Sassari, 07100, Italy.
| | - Elisa Serra
- Istituto Zooprofilattico Sperimentale della Sardegna, WOAH Reference Laboratory for Echinococcosis, National Reference Laboratory of Echinococcosis (CeNRE), Via Vienna 2, Sassari, 07100, Italy
| | - Silvia Dei Giudici
- Istituto Zooprofilattico Sperimentale della Sardegna, Diagnostica virologica, Sassari, 07100, Italy
| | - Angela Peruzzu
- Istituto Zooprofilattico Sperimentale della Sardegna, WOAH Reference Laboratory for Echinococcosis, National Reference Laboratory of Echinococcosis (CeNRE), Via Vienna 2, Sassari, 07100, Italy
| | - Silvia Crotti
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Perugia, 06126, Italy
| | - Patrizia Danesi
- Istituto Zooprofilattico Sperimentale della Venezie, Legnaro, 35020, Italy
| | - Andrea Carvelli
- Istituto Zooprofilattico Sperimentale del Lazio della Toscana, Roma, 00178, Italy
| | - Toni Piseddu
- Istituto Zooprofilattico Sperimentale della Sardegna, WOAH Reference Laboratory for Echinococcosis, National Reference Laboratory of Echinococcosis (CeNRE), Via Vienna 2, Sassari, 07100, Italy
| | - Giovanna Masala
- Istituto Zooprofilattico Sperimentale della Sardegna, WOAH Reference Laboratory for Echinococcosis, National Reference Laboratory of Echinococcosis (CeNRE), Via Vienna 2, Sassari, 07100, Italy
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Celik F, Selcuk MA, Kilinc SG, Kesik HK, Ahmed H, Wang Y, Simsek S, Cao J. Molecular discrimination of G1 and G3 genotypes of Echinococcus granulosus sensu stricto obtained from human, cattle, and sheep using the mitochondrial NADH dehydrogenase subunit 5 marker. Acta Trop 2024; 252:107124. [PMID: 38262573 DOI: 10.1016/j.actatropica.2024.107124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/01/2024] [Accepted: 01/17/2024] [Indexed: 01/25/2024]
Abstract
Cystic echinococcosis (CE) is a common zoonotic disease caused by the larval form of Echinococcus granulosus sensu lato. This study determined the genotype and haplotype differences using the NADH dehydrogenase subunit 5 gene in hydatid cyst samples. Human (n = 12), cattle (n = 28), and sheep (n = 31) hydatid cyst isolates were included. Seventy-one genomic DNA samples were successfully extracted, and a 759 bp mitochondrial NADH dehydrogenase subunit 5 gene fragment was amplified by PCR. Following the sequence analysis, E. granulosus sensu stricto isolates were identified as G1 (n = 61) and G3 (n = 10). A total of 23 haplotypes were obtained from the 71 E. granulosus s.s. G1 and G3 samples. The main haplotype was Hap01 (60.56 %), which consisted of the G1 genotype. The second largest haplotype was Hap04, which consisted entirely of the G3 genotype. Hap14 acted as a bridge between the G1 and G3 genotypes. This study identifies G1 as the dominant genotype in humans and farm animals in Turkey. High haplotype and nucleotide diversity in genotypes were observed. Additionally, this is the first report on the phylogeography and gene flow models of the E. granulosus s.s. population in Turkey using the NADH dehydrogenase subunit 5 gene, the best marker distinguishing between G1 and G3 genotypes.
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Affiliation(s)
- Figen Celik
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, 23119, Elazig, Turkey
| | - Muhammed Ahmed Selcuk
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, 23119, Elazig, Turkey; Department of Parasitology, Faculty of Veterinary Medicine, Siirt University, Siirt, Turkey
| | - Seyma Gunyakti Kilinc
- Department of Parasitology, Faculty of Veterinary Medicine, Bingol University, Bingol, Turkey
| | - Harun Kaya Kesik
- Department of Parasitology, Faculty of Veterinary Medicine, Bingol University, Bingol, Turkey
| | - Haroon Ahmed
- Department of Biosciences, COMSATS University Islamabad (CUI), Park Road, Chakh Shahzad, Islamabad, Pakistan
| | - Ying Wang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Parasitic Diseases at Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Shanghai 200025, China; Key Laboratory of Parasite and Vector Biology, National Health Commission of the People's Republic of China, Shanghai 200025, China; World Health Organization Collaborating Centre for Tropical Diseases, Shanghai 200025, China
| | - Sami Simsek
- Department of Biosciences, COMSATS University Islamabad (CUI), Park Road, Chakh Shahzad, Islamabad, Pakistan.
| | - Jianping Cao
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Parasitic Diseases at Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Shanghai 200025, China; Key Laboratory of Parasite and Vector Biology, National Health Commission of the People's Republic of China, Shanghai 200025, China; World Health Organization Collaborating Centre for Tropical Diseases, Shanghai 200025, China; The School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
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Kheninef A, Celik F, Aissaoui L, Simsek S. Molecular characterization and haplotypes of hydatid cyst isolates collected from humans and ruminants in Setif Province (northeast of Algeria) based on mitochondrial cytochrome C oxidase subunit 1 (mt-CO1) gene sequences. Parasitol Res 2024; 123:159. [PMID: 38466451 DOI: 10.1007/s00436-024-08176-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 02/28/2024] [Indexed: 03/13/2024]
Abstract
Cystic echinococcosis (CE) is a disease that can be transmitted from animals to humans, caused by the metacestode of Echinococcus granulosus. The disease has significant health and economic impacts worldwide, particularly in endemic areas. The study aimed to evaluate the prevalence of hydatid cysts in ruminants (cattle and sheep) (n = 2060) from the Setif Province of Algeria using microscopy. The results showed that hydatid cysts were detected in 9.6% (198/2060) of ruminants, with a higher prevalence in cattle (16.8%; 56/333) compared to sheep (8.2%; 142/1727). Molecular techniques were used to analyze a subset of animals consisting of 30 sheep and 4 cattle. Specifically, a fragment of the mitochondrial cytochrome c oxidase subunit 1 (mt-CO1) gene was sequenced and compared to sequences from seven humans from the same region. The results indicated that all isolates were identified as E. granulosus sensu stricto. Haplotype analysis identified 19 E. granulosus s.s. haplotypes arranged like a star, with the dominant haplotype (Hap04) at the center. Hap04 has been assigned a total of 17 positives, including positives from sheep, cattle, and two humans. This study is noteworthy for being the first to use a molecular approach to human and ruminant echinococcosis in Setif, a significant breeding region in Algeria.
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Affiliation(s)
- Amina Kheninef
- Research Laboratory of Improvement and Development of Animal and Plant Production, Department of Biology and Animal Physiology, University Ferhat Abbas of Setif, Setif, Algeria
| | - Figen Celik
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, 23119, Elazig, Turkey
| | - Lynda Aissaoui
- Research Laboratory of Improvement and Development of Animal and Plant Production, Department of Biology and Animal Physiology, University Ferhat Abbas of Setif, Setif, Algeria
| | - Sami Simsek
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, 23119, Elazig, Turkey.
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