Abstract
Trichinellosis is a zoonotic disease in humans caused by Trichinella spp. According to international regulations and guidelines, serological surveillance can be used to demonstrate the absence of Trichinella spp. in a defined domestic pig population. Most enzyme-linked immunosorbent assay (ELISA) tests presently available do not yield 100% specificity, and therefore, a complementary test is needed to confirm the diagnosis of any initial ELISA seropositivity. The goal of the present study was to evaluate the sensitivity and specificity of a Western Blot assay based on somatic Trichinella spiralis muscle stage (L1) antigen using Bayesian modeling techniques. A total of 295 meat juice and serum samples from pigs negative for Trichinella larvae by artificial digestion, including 74 potentially cross-reactive sera of pigs with other nematode infections, and 93 meat juice samples from pigs infected with Trichinella larvae were included in the study. The diagnostic sensitivity and specificity of the Western Blot were ranged from 95.8% to 96.0% and from 99.5% to 99.6%, respectively. A sensitivity analysis showed that the model outcomes were hardly influenced by changes in the prior distributions, providing a high confidence in the outcomes of the models. This validation study demonstrated that the Western Blot is a suitable method to confirm samples that reacted positively in an initial ELISA.
Similar content being viewed by others
References
Anonymous (2005) Verordnung über das Schlachten und die Fleischkontrolle. Nr. 817.190. http://www.admin.ch/ch/d/sr/8/817.190.de.pdf, accessed 30 September 2008
Bauer C (2006) Parasitologische untersuchungsmethoden. In: Schnieder T (ed) Veterinärmedizinische parasitologie. Parey, Stuttgart, Germany, pp 87–91
Branscum AJ, Gardner IA, Johnson WO (2005) Estimation of diagnostic-test sensitivity and specificity through Bayesian modeling. Prev Vet Med 68:145–163
Conzelmann C (1999) “Schwein 99” - Ein Gesundheits- und Produktivitätsprofil der Schweine in der Schweiz. II. Teil: Ferkelmortalität. Universität Bern, Bern, Switzerland
Cortes HC, Nunes S, Reis Y, Staubli D, Vidal R, Sager H, Leitao A, Gottstein B (2006) Immunodiagnosis of Besnoitia besnoiti infection by ELISA and Western blot. Vet Parasitol 141:216–225
Denkers EY, Wassom DL, Krco CJ, Hayes CE (1990) The mouse antibody response to Trichinella spiralis defines a single, immunodominant epitope shared by multiple antigens. J Immunol 144:3152–3159
Dupouy-Camet J, Bruschi F (2007) Management and diagnosis of human trichinellosis. In: Dupouy-Camet J, Murrell KD (eds) FAO/WHO/OIE guidelines for the surveillance, management, prevention and control of trichinellosis. OIE, Paris, pp 37–68
European Commission (2005) Regulation (EC) 2075/2005 of the European Parliament and of the Council of 5 December 2005 laying down specific rules on official controls for Trichinella in meat. Off J EC L338:60–82
Forbes LB, Gajadhar AA (1999) A validated Trichinella digestion assay and an associated sampling and quality assurance system for use in testing pork and horse meat. J Food Prot 62:1308–1313
Gamble HR, Anderson WR, Graham CE, Murrell KD (1983) Diagnosis of swine trichinosis by enzyme-linked immunosorbent assay (ELISA) using an excretory-secretory antigen. Vet Parasitol 13:349–361
Gamble HR, Rapic D, Marinculic A, Murrell KD (1988) Evaluation of excretory-secretory antigens for the serodiagnosis of swine trichinellosis. Vet Parasitol 30:131–137
Gamble HR, Pozio E, Bruschi F, Nöckler K, Kapel CMO, Gajadhar AA (2004) International Commission on Trichinellosis: recommendations on the use of serological tests for the detection of Trichinella infection in animals and man. Parasite 11:3–13
Gekeler F, Eichenlaub S, Mendoza EG, Sotelo J, Hoelscher M, Loscher T (2002) Sensitivity and specificity of ELISA and immunoblot for diagnosing neurocysticercosis. Eur J Clin Microbiol Infect Dis 21:227–229
Georgiadis MP, Johnson WO, Gardner IA, Singh R (2003) Correlation-adjusted estimation of sensitivity and specificity of two diagnostic tests. Appl Statist 52:63–76
Gruden-Movsesijan A, Ilic N, Sofronic-Milosavljevic L (2002) Lectin-blot analyses of Trichinella spiralis muscle larvae excretory-secretory components. Parasitol Res 88:1004–1007
Hadorn D, Hauser R, Stark KD (2002) Epidemiologische Grundlagen und Resultate der Stichprobenuntersuchung 2001 in der schweizerischen Schweinepopulation. Schweiz Arch Tierheilkd 144:532–541
Huber R (1999) “Schwein 99” - Ein Gesundheits- und Produktivitätsprofil der Schweine in der Schweiz. I. Teil: Morbidität und Mortalität der Sauen. Universität Bern, Bern, Switzerland
Hui SL, Walter SD (1980) Estimating the error rates of diagnostic tests. Biometrics 36:167–171
Johnson WO, Gastwirth JL, Pearson LM (2001) Screening without a “gold standard”: the Hui-Walter paradigm revisited. Am J Epidemiol 153:921–924
Kapel CM, Webster P, Lind P, Pozio E, Henriksen SA, Murrell KD, Nansen P (1998) Trichinella spiralis, T. britovi, and T. nativa: infectivity, larval distribution in muscle, and antibody response after experimental infection of pigs. Parasitol Res 84:264–271
Kociecka W (2000) Trichinellosis: human disease, diagnosis and treatment. Vet Parasitol 93:365–383
Marinculic A, Rapic D, Brglez J, Dzakula N, Stojiljkovic D (1991) Epidemiological survey of trichinellosis in Yugoslavia. Southeast Asian J Trop Med Public Health 22(Suppl):302–307
Muller N, Frei E, Nunez S, Gottstein B (2007) Improved serodiagnosis of alveolar echinococcosis of humans using an in vitro-produced Echinococcus multilocularis antigen. Parasitology 134:879–888
Nöckler K, Kapel CMO (2007) Detection and surveillance for Trichinella: meat inspection and hygiene, and legislation. In: Dupouy-Camet J, Murrell KD (eds) FAO/WHO/OIE guidelines for the surveillance, management, prevention and control of trichinellosis. OIE, Paris, pp 69–97
Nöckler K, Voigt WP, Protz D, Miko A, Ziedler K (1995) Intravitale Diagnostik der Trichinellose beim Schwein mit dem indirekten ELISA. Berl Munch Tierarztl Wochenschr 108:167–174
Nöckler K, Pozio E, Voigt WP, Heidrich J (2000) Detection of Trichinella infection in food animals. Vet Parasitol 93:335–350
Ortega-Pierres MG, Yepez-Mulia L, Homan W, Gamble HR, Lim PL, Takahashi Y, Wassom DI, Appleton JA (1996) Workshop on a detailed characterization of Trichinella spiralis antigens: a platform for future studies on antigens and antibodies to this parasite. Parasite Immunol 18:273–284
Özkoç S, Bayram Delibas S, Akisü ç (2005) Use of the Western Blot assay in the diagnosis of trichinosis (in Turkish). Türkiye Parazitoloji Dergisi 29:26–30
Pozio E, Sofronic-Milosavljevic L, Gomez Morales MA, Boireau P, Nockler K (2002) Evaluation of ELISA and Western Blot analysis using three antigens to detect anti-Trichinella IgG in horses. Vet Parasitol 108:163–178
Pozio E, Gomez Morales MA, Dupouy-Camet J (2003) Clinical aspects, diagnosis and treatment of trichinellosis. Expert Rev Anti Infect Ther 1:471–482
Robert F, Weil B, Kassis N, Dupouy-Camet J (1996) Investigation of immunofluorescence cross-reactions against Trichinella spiralis by Western blot (immunoblot) analysis. Clin Diagn Lab Immunol 3:575–577
Sofronic-Milosavljevic L, Ilic N, Djordjevic M, Savic M, Gruden-Movsesijan A, Cuperlovic K, Murrell KD (2005) Anti-Trichinella antibodies detected in chronically infected horses by IFA and Western blot, but not by ELISA. Vet Parasitol 132:107–111
Staubli D, Nunez S, Sager H, Schares G, Gottstein B (2006) Neospora caninum immunoblotting improves serodiagnosis of bovine neosporosis. Parasitol Res 99:648–658
World Organisation for Animal Health (2008a) Manual of diagnostic tests and vaccines for terrestrial animals. Chapter 2.1.16 Trichinellosis. http://www.oie.int/eng/normes/mmanual/2008/pdf/2.01.16_TRICHINELLOSIS.pdf, accessed 30 September 2008
World Organisation for Animal Health (2008b) Terrestrial Animal Health Code 2008. Chapter 8.14 Trichinellosis. http://www.oie.int/eng/normes/mcode/en_chapitre_1.8.14.htm, accessed 30 September 2008
Yepez-Mulia L, Arriaga C, Viveros N, Adame A, Benitez E, Ortega-Pierres MG (1999) Detection of Trichinella infection in slaughter horses by ELISA and western blot analysis. Vet Parasitol 81:57–68
Yera H, Andiva S, Perret C, Limonne D, Boireau P, Dupouy-Camet J (2003) Development and evaluation of a Western blot kit for diagnosis of human trichinellosis. Clin Diagn Lab Immunol 10:793–796
Zarlenga DS, Chute MB, Martin A, Kapel CM (2001) A single, multiplex PCR for differentiating all species of Trichinella. Parasite 8:S24–S26
Acknowledgments
We thank Verena Eidam, Ramona Graf, and Christine Wittwer for excellent technical assistance. All experiments were performed according to the current law of Switzerland.
Author information
Authors and Affiliations
Corresponding author
Additional information
Frey and Schuppers contributed equally to this work.
This work was funded by the Swiss Federal Veterinary Office, grant number 1.06.03.
Rights and permissions
About this article
Cite this article
Frey, C.F., Schuppers, M.E., Nöckler, K. et al. Validation of a Western Blot for the detection of anti-Trichinella spp. antibodies in domestic pigs. Parasitol Res 104, 1269–1277 (2009). https://doi.org/10.1007/s00436-008-1321-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00436-008-1321-9