Ionic composition of the rectal contents and excreta of the reduviid bug Triatoma infestans
Ionic composition of the rectal contents and excreta of the reduviid bug Triatoma infestans
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DOI：
10.1016/s0022-1910(00)00170-0
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发表时间：
2001-07-01
影响因子：
2.2
通讯作者：
Schaub, GA
中科院分区：
文献类型：
--
作者：
Kollien, AH;Grospietsch, T;Schaub, GA
我们已经调查了吸血虫Triatoma infestans的直肠内容物、粪便和尿液的化学成分。这就是重要的致病生物克氏锥虫生活的环境。直接喂养后的Triatoma infestans，排泄物的pH值从酸性切换到碱性pH值，1天后，回到一个略带酸性的pH值。渗透压变化的初始排泄物和直肠内容物的第二天之间的300和460 mosmol/kg H2O的膳食，但经过一个额外的一天，它增加到350-970 mosmol/kg H2O。离子毛细管电泳测定结果表明，硫酸盐和磷酸盐占主导地位的直肠内容物在未进食的错误。喂食后，前四滴液体排泄物主要是氯化钠溶液（每滴>150 mM）。1至10天后，喂养强烈的个别离子的浓度的个体差异是显而易见的，特别是钾和钠。氯化物的平均浓度保持在约70 mM;硫酸盐和磷酸盐在前1或2天内显示出增加，然后分别达到约160和210 mM的水平。长期饥饿的臭虫的直肠内容物含有高浓度的磷酸盐和钾;硫酸盐和钠略低。(C)2001爱思唯尔科技有限公司版权所有。
We have investigated the chemical composition of the rectal contents, faeces and urine of the blood-sucking bug Triatoma infestans. This is the environment in which the important disease-causing organism, Trypanosoma cruzi, lives. Directly after feeding of Triatoma infestans, the pH of the excreta switched from an acidic to an alkaline pH and, 1 day later, back to a slightly acidic pH. The osmolality varied in the initial excreta and in the rectal contents on the day following the meal between 300 and 460 mosmol/kg H2O, but after an additional day it increased to 350-970 mosmol/kg H2O. Determinations by ion capillary electrophoresis showed that sulphate and phosphate dominated the rectal contents in unfed bugs. After feeding, the first four drops of fluid excreta were mainly a sodium chloride solution (>150 mM for each). One to 10 days after feeding strong individual variations in the concentrations of individual ions were evident, especially for potassium and sodium. Mean concentrations of chloride remained at about 70 mM; sulphate and phosphate showed an increase within the first 1 or 2 days and then reached a level of about 160 and 210 mM, respectively. The rectal contents of long-term starved bugs contained high concentrations of phosphate and potassium; sulphate and sodium were slightly lower. (C) 2001 Elsevier Science Ltd. All rights reserved.