ABSTRACT This study was to investigate the piezotolerance and diversity indices of microflora of Indian white prawn (Fenneropenaeus indicus) after high pressure (HP)-treatment. Indian white prawns subjected to HP-treatments and its effect was studied up to species level and compared with unpressurized samples. The bacterium was identified by using bacterial identification schemes, biochemical tests and API kits (bioMérieux, Marcyl’Etoile, France). Diversity analysis was performed using PRIMER (Plymouth Routines in Multivariate Research) software v 5.2.2. The significant elimination of microflora was found to be proportional with the pressure level. In the case of spore formers, mere destruction was noticed after HP-treatment. Arthrobacter spp., Listeria grayi and Corynebacterium spp. were the most piezotolerant bacteria in HP-treated samples. Diversity indices revealed a significant reduction of microflora of Indian white prawn. The apparent reduction of microflora with pressure level was clearly evident from the diversity indices; moreover a diminished piezotolerance of Gram negative spoilage bacteria was also observed.

中文翻译：

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高压处理印度白对虾（Fenneropenaeus indicus）微生物群落的变化

摘要 本研究旨在研究高压 (HP) 处理后印度白虾 (Fenneropenaeus indicus) 微生物群落的耐压性和多样性指数。印度白虾经过 HP 处理，其效果在物种水平上进行了研究，并与未加压的样品进行了比较。该细菌通过使用细菌鉴定方案、生化测试和 API 试剂盒（bioMérieux, Marcyl'Etoile, France）进行鉴定。使用 PRIMER（多元研究中的普利茅斯例程）软件 v 5.2.2 进行多样性分析。发现微生物群落的显着消除与压力水平成正比。在孢子形成者的情况下，HP 处理后仅观察到破坏。节杆菌属、灰色李斯特菌和棒状杆菌属。是 HP 处理样品中最耐压的细菌。多样性指数显示印度白虾的微生物群落显着减少。从多样性指数可以明显看出微生物群落随压力水平的明显减少；此外，还观察到革兰氏阴性腐败菌的耐压性降低。