To analyze the interrelated dynamics of microalgae and algicidal bacteria (i.e. bacteria that kill and utilize microalgal cells) in a seawater environment, we investigated particle-associated and free-living algicidal bacteria during a diatom bloom in the Seto Inland Sea (Japan) in the summer of 2005. A conventional most probable number (MPN) protocol revealed that bacteria that are algicidal a...

RIVERA, F., ORTEGA, A., LÓPEZ-OCHOTERENA, E. & PAZ, M. E. 1979. A quantitative morphological and ecological study of protozoa polluting tap water in Mexico City. Trans. Amer. Micros. Soc., 98: 465469. The stiidy was performed using samples obtained from the tap water of the most populated area of the Federal District in Mexico City. The organisms were concentrated through filtration procedures ...

We studied the role of bacterial secondary metabolites in the context of grazing protection against protozoans. A model system was used to examine the impact of violacein-producing bacteria on feeding rates, growth, and survival of three common bacterivorous nanoflagellates. Freshwater isolates of Janthinobacterium lividum and Chromobacterium violaceum produced the purple pigment violacein and ...

The underground uranium mine Königstein (Saxony, Germany), currently in the process of remediation, represents an underground acid mine drainage (AMD) environment, that is, low pH conditions and high concentrations of heavy metals including uranium, in which eye-catching biofilm formations were observed. During active uranium mining from 1984 to 1990, technical leaching with sulphuric acid was ...

Effects of inorganic nitrogen (N03) enrichment on phytoplankton were studied using a factorial design experiment. Using species assemblages from Lake Huron waters, the effects of NO] and total phosphorus (TSP) additions on species abundance and composition were monitored. The speciesnutrient relationship was determined by canonical correspondence analysis (CCA). In addition, divisional differen...

Studies on natural infection by Leishmania spp of sandflies collected in endemic and nonendemic areas can provide important information on the distribution and intensity of the transmission of these parasites. This study sought to investigate the natural infection by Leishmaniain wild female sandflies. The specimens were caught in the city of Corumbá, state of Mato Grosso do Sul (Brazil) betwee...

The effects of acriflavine on two species of Trypanosomatidae, Crithidia luciliae and Trypanosoma mega, have been investigated. It has been observed that kinetoplastic (i.e. mitochondrial) DNA is lost in a high percentage of acriflavine-treated cells. Resting flagellates, from stationary-phase or hemin-deficient cultures, are considerably more resistant to the acridine than are flagellates from...

A modified fluorescence in situ hybridization (FISH) method was used to analyze bacterial prey composition in protistan food vacuoles in both laboratory and natural populations. Under laboratory conditions, we exposed two bacterial strains (affiliated with beta- and gamma-Proteobacteria -- Aeromonas hydrophila and Pseudomonas fluorescens, respectively) to grazing by three protists: the flagella...

Havel, R. J., Eder, H. A. & Bragdon, J. H. (1955) J. Clin. Invest. 34, 1345-1353 Henly, A. A. (1957) Analyst (London) 82,286-287 Kane, J. P. (1973) Anal. Eiochern. 53, 35e364 Lowry, 0. H.,Rosebrough, N. J., Farr, A. L. &Randall, R. J. (1951)J. Eiol. Chem. 193,265-275 Mies, 0. D., Faergeman, O., Hamilton, R. L. & Havel, R. J. (1975)J. Clin. Invest. 56,603-615 Noel, S . P., Dolphin, P. J. & Ruben...