Search results
Results from the WOW.Com Content Network
To eliminate most complaints caused by CO 2, the total indoor CO 2 level should be reduced to a difference of no greater than 700 ppm above outdoor levels. [90] The National Institute for Occupational Safety and Health (NIOSH) considers that indoor air concentrations of carbon dioxide that exceed 1000 ppm are a marker suggesting inadequate ...
Legionella is a genus of gram-negative bacteria that can be seen using a silver stain or grown in a special media that contains cysteine, an amino acid.It is known to cause legionellosis [3] (all illnesses caused by Legionella) including a pneumonia-type illness called Legionnaires' disease and a mild flu-like illness called Pontiac fever. [3]
The level of ions generated has been reported to be usually below EPA Safe Water Drinking Act Lead and Copper Rule AL for copper. [3] The AL for copper in potable water is 1.3 ppm (Cu) and the SCL for silver is 0.1 ppm (Ag) (which is the same as 100 ppb). It is important to collect and handle samples correctly in order to get accurate results.
The data on Legionella are limited in developing countries, and Legionella-related illnesses likely are underdiagnosed worldwide. [16] Improvements in diagnosis and surveillance in developing countries would be expected to reveal far higher levels of morbidity and mortality than are currently recognised.
Legionella pneumophila, the primary causative agent for Legionnaire's disease, is an aerobic, pleomorphic, flagellated, non-spore-forming, Gram-negative bacterium. [ 1 ] [ 2 ] L. pneumophila is a intracellular parasite that preferentially infects soil amoebae and freshwater protozoa for replication.
This treatment — conducted on Aug. 20 — was successful in two of the seven affected areas, but the other sections still had "slightly elevated" levels of legionella, Barone said Tuesday.
Legionella anisa is traditionally detected using the same culture methods as described for Legionella. However, some research suggests L. anisa may require a co-culture method that accounts for the close relationship with amoebae. When present in a sample but still contained within an amoeba host, the plating method may return false-negative ...
Legionella feeleii is a Gram-negative, rod-shaped bacterium from the genus Legionella which was isolated from an automobile plant and which was held responsible for causing Pontiac fever in 317 workers. [3] [4] The organism did not grow on blood agar, required L-cysteine, and showed significant quantities of branched-chain fatty acids.