We assessed metal/metalloid pollutants (through multi-indices) in seawater, sediments, tissues and shells of gastropods using various indices such as contamination degree (modified/unmodified; Cd/mCd; 1875/187.5). From sediment indices; e.g. the potential ecological risk index/enrichment factor (Eri/EF; 3396.8/105.5) indicated the area to be highly contaminated with metal/metalloid pollutants. Indeed, bioaccumulation with these materials was gastropod size dependent. Antimicrobial and percentage activity indices (AMI/PAI) for; T. telescopium was (AMI/PAI; 1.59/159), N. albicilla (1.14/114) and L. coronata (0.95/95) against E. coli. Similarly T. telescopium (1.33/133), N. albicilla (1.19/119) and L. coronata (1.14/114) have AMI/PAI against A. terreus. The total activity index (TAI), for T. telescopium was the highest, while L. coronata has lowest for all pathogens. This study indicates, T. telescopium, N. albicilla and L. coronata, surviving under metal/metalloid stress exhibited altered natural defense to pathogens which was related to the degree of toxin bioaccumulation.

我们使用污染程度（修改/未修改；Cd/mCd；1875/187.5）等各种指标评估了海水、沉积物、组织和腹足动物壳中的金属/准金属污染物（通过多项指标）。来自沉积物指数；例如，潜在生态风险指数/富集系数 (Eri/EF; 3396.8/105.5) 表明该区域被金属/类金属污染物高度污染。事实上，这些材料的生物积累与腹足动物的大小有关。抗菌和百分比活性指数 (AMI/PAI) 用于；T. Telescopium是 (AMI/PAI; 1.59/159)、N. albicilla (1.14/114) 和L. coronata (0.95/95) 对抗大肠杆菌。类似的T. Telescopium (1.33/133), N. albicilla(1.19/119) 和L. coronata (1.14/114) 具有针对A. terreus 的AMI/PAI 。T. Telescopium的总活性指数 (TAI)最高，而L. coronata在所有病原体中最低。该研究表明，在金属/类金属胁迫下存活的T. Telescopium、N. abicilla和L. coronata表现出对病原体的自然防御发生改变，这与毒素生物积累的程度有关。