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首页> 外文期刊>Indian Journal of Fisheries >Lagenidium sp infection in the larval stages of the freshwater prawn Macrobrachium rosenbergii (De Man)
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Lagenidium sp infection in the larval stages of the freshwater prawn Macrobrachium rosenbergii (De Man)

机译：淡水虾罗氏沼虾（De Man）幼体阶段的Lagenidium sp感染

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摘要

This study investigated the occurrence, infectivity and pathogenecity of Lagenidium sp. in the hatchery of Macro brachium rosenbergii. Microscopic examination revealed that the Lagenidium sp. infected zoea appeared white in colour. The presence of non-septate fungal hyphae was observed within the body of the exposed larvae replacing nearly all the muscles. Light and scanning electron microscopy demonstrated that 24 h post-exposure, the infection began to appear externally. After 32 h, zoospores appeared on external hyphae of infected larvae. The fungus Lagenidium sp. exhibited optimum growth at 30 degrees C, 0-2% NaCl and slow growth at 5% NaCl on potato dextrose agar (PDA). Antimicrobials, clotrimazole and griseofulvin were found to be more effective than miconazole, itraconazole and fluconazole in inhibiting the growth of Lagenidium sp. Under experimental conditions, Lagenidium sp. causes 100% mortality within two days of infection, producing 10(3) spores ml(-1)
机译：本研究调查了Lagenidium sp。的发生，传染性和致病性。在罗氏沼虾孵化场中。显微镜检查表明，Lagenidium sp。感染的zoea呈白色。在裸露的幼虫体内观察到存在非分隔的真菌菌丝，几乎取代了所有肌肉。光学和扫描电子显微镜显示，暴露后24小时，感染开始出现在外部。 32小时后，被感染幼虫的外部菌丝上出现游动孢子。真菌Lagenidium sp。在马铃薯葡萄糖琼脂（PDA）上，在30°C，0-2％NaCl和5％NaCl的条件下表现出最佳生长。发现抗菌药，克霉唑和灰黄霉素比咪康唑，伊曲康唑和氟康唑在抑制Lagenidium sp。的生长方面更有效。在实验条件下，Lagenidium sp。在感染后两天内导致100％的死亡率，产生10（3）孢子ml（-1）

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