Prevalence of Yeasts and Mycelial Fungi in Bovine Parasitic Otitis in the State of Minas Gerais, Brazil
Prevalence of Yeasts and Mycelial Fungi in Bovine Parasitic Otitis in the State of Minas Gerais, Brazil
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巴西米纳斯吉拉斯州牛寄生性中耳炎中酵母菌和菌丝真菌的流行情况
DOI：
10.1046/j.1439-0450.2001.00474.x
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. S. Hamdan
中科院分区：
文献类型：
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作者：
E. R. Duarte;J. C. Resende;C. Rosa;J. S. Hamdan
在热带地区，杆状线虫和雷氏螨属螨的侵染被认为是牛外耳炎的主要原因。最近，马拉色菌属的酵母菌与相对高百分比的耳炎病例相关，但其他酵母菌和菌丝体真菌的发生尚未在文献中报道。本文研究了45头患有外耳道寄生虫性耳炎的牛耳道中真菌的存在。在添加橄榄油的Mycosel培养基中培养的45种培养物中，有31种（68.9%）的马拉色菌属酵母菌结果呈阳性。在沙氏葡萄糖培养基中的45个培养物显示了7个（15.5%）假丝酵母属的酵母、5个（11.1%）红酵母属的酵母、2个（4.4%）曲霉属的真菌和8个“Micelia sterilia”的生长。未来的研究可能会证实和阐明这些药物在牛耳炎病因学中的重要性。
Infestations by rhabditiform nematodes and acarids of the genus Raillietia are considered the primary causes of external otitis in cattle in tropical regions. Recently, yeasts of the genus Malassezia have been associated with a relatively high percentage of otitis cases, but the occurrence of other yeasts and mycelial fungi has not yet been reported in the literature. This work studied the presence of fungi in the ear canal of 45 cattle with external parasitic otitis. The results were positive for yeasts of the genus Malassezia in 31 (68.9 %) of the 45 cultures in Mycosel medium supplemented with olive oil. The 45 cultures in Sabouraud dextrose medium revealed the growth of seven (15.5 %) yeasts of the genus Candida, five (11.1 %) Rhodotorulamucilaginosa, two (4.4 %) fungi of the genus Aspergillus and eight ‘Micelia sterilia’. Future studies may confirm and elucidate the importance of these agents in the aetiology of bovine otitis.