珠江河口霍乱弧菌数量与离子浓度关系研究  

Research on the correlation of Vibrio cholerae and ion concentration in the Pearl River estuary

作　　者：岳玉娟[1] 王多春[2] 龚建华[3] 

机构地区：[1]中国科学院生态环境研究中心,北京100185 [2]中国疾病预防控制中心传染病预防控制所传染病预防控制国家重点实验室 [3]中国科学院遥感应用研究所

出　　处：《现代预防医学》2013年第2期213-216,共4页Modern Preventive Medicine

基　　金：传染病重大专项(2008ZX10004-012);国家自然科学基金(40871181)

摘　　要：目的分析珠江河口水体霍乱弧菌阳性检出率与离子浓度之间关系,探讨水体中离子浓度对霍乱弧菌数量的影响。方法对2006年3月～2007年2月珠江河口24个采样点每月采样1次的霍乱弧菌数量与水体中Mg2+、K+、Ca2+、Na+浓度数据,采用Spearman秩相关函数,研究基于采样点的霍乱弧菌检出率与离子浓度之间的相关关系。结果珠江河口下游入海口区每个采样点的Mg2+、K+、Ca2+、Na+浓度年均值几乎所有的值均大于珠江河口广州城区的值,最高可达30倍。在0.05的检验水准下,广州城区霍乱弧菌阳性检出率与Mg2+浓度(rs为-0.541)显著负相关,与K+浓度(rs为0.544)和Ca2+浓度(rs为0.567)显著正相关,下游入海口区霍乱弧菌阳性检出率与Mg2+等离子浓度相关性不显著。结论在珠江河口,霍乱弧菌阳性检出率与离子浓度较低的广州城区的离子浓度存在相关关系,而与离子浓度较高的下游入海口区的离子浓度相关性不显著,提示霍乱弧菌数量与存活环境中一定的阈值范围内的Mg2+、K+、Ca2+浓度存在一定的消长关系。OBJECTIVE To study the correlation between the positive rate of Vibrio cholerae （V. cholerae） and ion concentration in the Pearl River estuary, and discuss the influence of ion concentration on the dynamics of V. cholerae. METHODS Through analyzing the monthly data of 24 sampling points in the Pearl River estuary from March 2006 to Feb. 2007, Spearman＇ s rank correlation was adopted to investigate the correlation of the positive rate of V. cholerae and the ion concentration concluding Mg^2＋, K^＋, Ca^2＋ and Na^＋ based on the sampling points. RESULTS Almost all of the values of Mg^2＋, K^＋, Ca^2＋ and Na^＋ concentrations in the downstream were bigger than that in the urban area, and the highest was 30 times. Under the significance level 0.05, V. cholerae was significantly passively correlated with Mg^2＋ concentration （rs= -0.541 ） and was significantly positively correlated with K^＋ concentration （rs = 0.544） and Ca^2＋ concentration （rs = 0.567） in the urban area, but the correlation of the two was not significant in the downstream. CONCLUSION V. cholerae is correlated with the ion concentration in the urban area with lower ion concentration, but the correlation of the two is not significant in the downstream with higher ion concentration. Therefore, V. cholerae is correlated with the ion concentrations of Mg^2＋, K^＋ and Ca^2＋ in certain threshold scope.

关 键 词：霍乱弧菌 珠江河口 离子浓度 Spearman秩相关 

分 类 号：R516.5[医药卫生—内科学]