63 1. C. Weissenbacher-Lang, T. Voglmayr, F. Waxenecker, U. Hofstetter, H. Weissenbock, K. Hoelzle, L.E. Hoelzle, M. Welle, M. Ogris, G. Bruns, M. Ritzmann.Porcine ear necrosis syndrome: A preliminary investigation of putative infectious agents in piglets and mycotoxins in feed. The Veterinary Journal 194 (2012) 392–397. 2. DeLay J, Dewey CE, Friendship RM, Park J, Poljak Z, Slavic D. An investigation of ear necrosis in Pigs. The Canadian veterinary journal, 2022. Web: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3624920/ 3. Nadis animal health skills - ear tip necrosis. NADIS. 2022, Web: https://www.nadis.org.uk/disease-a-z/pigs/eartip-necrosis/ 4. Elisabeth ON, Henrik W, Marie EB, Poul B. Risk Factors For Ear Necrosis And Tail Lesions In Weaners. Proceedings of the International Pig Veterinary Society Congress. 22-26, 2008. 5. 王羣。淺談豬第2型環狀病毒。獸醫專訊第6期: 13-19, 2013. 6. Vassilis P. Ear necrosis syndrome in weaning pigs associated with PCV2 infection: A case report. Vet Res Forum. 2012 Summer; 3(3): 217–220. 7. Dominiek M, Filip B, Koen C, Mateusz M, Siska C. Review - Porcine ear necrosis. The Veterinary Journal, 2021. 8. The pig site. Greasy pig disease (Exudative epidermitis). 2022. Web: https://www.thepigsite.com/disease-guide 9. Frida K. Treponema spp. in Porcine Skin Ulcers. Doctoral Thesis Swedish University of Agricultural Sciences Uppsala. 2014 10.Frida K, Olov S, Katinka B, Claes F, Märit P. Occurrence of Treponema spp. in porcine skin ulcers and gingiva. Veterinary Microbiology Volume 165, Issues 3–4, 30 August 2013, Pages 402-409. 結語 一般而言，單純由外傷引起的耳尖部壞死通常不會造成嚴重後果，也甚少會影 響豬隻生長發育以及精神食慾，但若輕忽則可能會引發後續繼發性病原感染，將造 成經濟損失，又如果造成豬隻耳尖部壞死的主因為病原性，解決病原應是首要任務， 病原性感染可能伴隨的不止是耳尖部壞死，往往帶有其他更嚴重的臨床症狀。 豬耳尖壞死症與環境因素（溫度、濕度、環境衛生、場設器具及地板種類）、 行為因素（豬隻啃咬彼此或打架行為）和管理因素（豬隻飼養密度或生活空間）以 及病原因素（如Staphylococcus、PCV2等）息息相關，可能是單一因子引發或多 因子造成，找出根本原因改善才能夠對症下藥，雖然此疾病時常被忽略，也往往不 會造成嚴重的後果與損失，但是難保有潛在的疾病正在伺機潛伏，萬一成為其他疾 病破口則得不償失，所以當場內觀察到豬隻出現耳尖部壞死的情況時，應當多加留 意並且做出相關處置對策。
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