Laboratory of Healthy Aquaculture, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.
FEMS Microbiol Lett. 2010 Jan;302(2):144-50. doi: 10.1111/j.1574-6968.2009.01841.x. Epub 2009 Oct 31.
Infected yellow catfish (Pelteobagrus fulvidraco) were sent from Niushan Lake Fishery, Hubei Province, China, to our laboratory for diagnosis. Macroscopic daffodil yellow mold was observed on the heads and fins of the fish and one Mucor species was isolated. Based on the morphological and molecular analysis, the species was identified as Mucor circinelloides. Its optimum growth temperature was 30 degrees C and it could not grow at 40 degrees C. The infectivity results showed wound infection could cause 100% cumulative mortalities at all experimental CFU (10(6), 10(7) and 10(8)). The cumulative mortalities of the intraperitoneal infection increased along with the sporangiospore concentrations; the highest mortality was 90% with 10(8) CFU. Histopathological studies showed M. circinelloides could cause a series of pathological changes in the host tissues and they disseminated in different viscera, perhaps by the blood. This is the first report of M. circinelloides infection in yellow catfish.
受感染的黄颡鱼（Pelteobagrus fulvidraco）从中国湖北省牛山湖渔场被送往我们的实验室进行诊断。在鱼的头部和鳍上观察到了明显的水仙花黄霉病，并分离出一种毛霉属真菌。基于形态学和分子分析，该物种被鉴定为卷枝毛霉。其最适生长温度为 30°C，不能在 40°C 下生长。感染性结果表明，伤口感染可导致所有实验 CFU（10^6、10^7 和 10^8）下 100%的累积死亡率。腹腔感染的累积死亡率随着孢子囊浓度的增加而增加；用 10^8 CFU 处理时，死亡率最高可达 90%。组织病理学研究表明，卷枝毛霉可导致宿主组织发生一系列病理变化，这些变化可能通过血液在不同的内脏中传播。这是卷枝毛霉感染黄颡鱼的首例报告。
