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Ranaraja DMAE, Mahakapuge TAN, Thilakarathne DS, Dharmasuriya JYC, Rajapakse RPVJ. Hepatic trematode Platynosomum sp. (Dicrocoeliidae) from a domestic cat in Colombo, Sri Lanka: Case report and molecular identification. Vet Parasitol Reg Stud Reports 2022; 34:100762. [PMID: 36041797 DOI: 10.1016/j.vprsr.2022.100762] [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: 10/18/2021] [Revised: 05/29/2022] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Platynosomum is a digenean trematode causing hepatobiliary disease in cats in tropical and subtropical regions. The presence of Platynosomum species in Sri Lanka has not been previously reported or investigated. In the current study, we report a clinical case of a cat suffering from hepatic and biliary complications. Fine-needle aspiration of the biliary extract revealed a large number of parasite eggs, and the morphological and molecular identification of eggs was carried out. Molecular phylogenetics was performed using the nuclear ribosomal Internal Transcribed Spacer 2 (ITS2) and a portion of a mitochondrially encoded gene; Cytochrome C Oxidase subunit 1 (COX1). Through a combination of history, clinical signs, blood reports, ultrasound scanning, light microscopy of eggs from biliary aspirate and molecular studies, the disease was confirmed as parasitism caused by a Platynosomum like species. The Platynosomum species in Sri Lanka is phylogenetically related to Platynosomum illiciens reported from Costa Rica, Central America. This case emphasizes the importance of future studies in Sri Lanka regarding the prevalence and distribution of Platynosomum among cat populations. Further, the inclusion of feline platynosomiasis in the differential diagnoses list for hepatobiliary diseases is required.
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Affiliation(s)
| | - Thilini Anupama Nanayakkarawasam Mahakapuge
- Division of Veterinary Parasitology, Department of Veterinary Pathobiology, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - Dulari Samanthika Thilakarathne
- Division of Veterinary Parasitology, Department of Veterinary Pathobiology, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
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Molecular testing for clinical diagnosis and epidemiological investigations of intestinal parasitic infections. Clin Microbiol Rev 2016; 27:371-418. [PMID: 24696439 DOI: 10.1128/cmr.00122-13] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Over the past few decades, nucleic acid-based methods have been developed for the diagnosis of intestinal parasitic infections. Advantages of nucleic acid-based methods are numerous; typically, these include increased sensitivity and specificity and simpler standardization of diagnostic procedures. DNA samples can also be stored and used for genetic characterization and molecular typing, providing a valuable tool for surveys and surveillance studies. A variety of technologies have been applied, and some specific and general pitfalls and limitations have been identified. This review provides an overview of the multitude of methods that have been reported for the detection of intestinal parasites and offers some guidance in applying these methods in the clinical laboratory and in epidemiological studies.
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Ezeh C, Yin M, Li H, Zhang T, Xu B, Sacko M, Feng Z, Hu W. High genetic variability of Schistosoma haematobium in Mali and Nigeria. THE KOREAN JOURNAL OF PARASITOLOGY 2015; 53:129-34. [PMID: 25748721 PMCID: PMC4384788 DOI: 10.3347/kjp.2015.53.1.129] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 10/21/2014] [Accepted: 10/23/2014] [Indexed: 12/29/2022]
Abstract
Schistosoma haematobium is one of the most prevalent parasitic flatworms, infecting over 112 million people in Africa. However, little is known about the genetic diversity of natural S. haematobium populations from the human host because of the inaccessible location of adult worms in the host. We used 4 microsatellite loci to genotype individually pooled S. haematobium eggs directly from each patient sampled at 4 endemic locations in Africa. We found that the average allele number of individuals from Mali was significantly higher than that from Nigeria. In addition, no significant difference in allelic composition was detected among the populations within Nigeria; however, the allelic composition was significantly different between Mali and Nigeria populations. This study demonstrated a high level of genetic variability of S. haematobium in the populations from Mali and Nigeria, the 2 major African endemic countries, suggesting that geographical population differentiation may occur in the regions.
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Affiliation(s)
- Charles Ezeh
- Key Laboratory of Parasite and Vector Biology, Ministry of Public Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
| | - Mingbo Yin
- School of Life Science, Fudan University, Shanghai 200433, China
| | - Hongyan Li
- School of Life Science, Fudan University, Shanghai 200433, China
| | - Ting Zhang
- Key Laboratory of Parasite and Vector Biology, Ministry of Public Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
| | - Bin Xu
- Key Laboratory of Parasite and Vector Biology, Ministry of Public Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
| | - Moussa Sacko
- Laboratory of Parasitology, Institut National de Recherche en Sante Publique, 1771, Bamako, Mali
| | - Zheng Feng
- Key Laboratory of Parasite and Vector Biology, Ministry of Public Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
| | - Wei Hu
- Key Laboratory of Parasite and Vector Biology, Ministry of Public Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China ; School of Life Science, Fudan University, Shanghai 200433, China
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