Streptococcus, and molecular-biological methods

Streptococci are classified according to their ability to destroy

fresh blood in blood agar plates. Some streptococci did not affect blood >>. This

<< non-hemolytic streptococcus (see below).

Streptococcus haemolytica cause partial destruction of the blood, and

-colonies surrounded by a halo of green. Green pigment

thinking are metabolic products of degradation of heme. For

on the color halo that surrounds-hemolytic streptococcus, they are often referred to as

viridens streptococci (viridis translated from Latin, green). -Hemolytic streptococcus, which

must be differentiated from others. This

pneumococcus. This is the cause pneumococcal pneumonia and meningitis, and

less serious infections. Pneumococcus sensitive >> << to optochin, antimicrobial agent, and lysed when suspended in the solution >> << bile salts. All other viridens streptococci resistant to optochin

, and also insoluble salts of bile acids. Viridens streptococci large and diverse group of bacteria

are poorly differentiated, but they include organisms that play a role in the

caries, and those that can cause endocarditis and brain abscesses. Viridens streptococci often not differentiated in diagnostic laboratories. -Hemolytic streptococcus cause

complete breakdown of blood in blood agar plates fresh. Colonies

surrounded by a strattera side effects halo, which is quite clear. Clinically most important

hemolytic streptococcus is Streptococcus pyogenes. This refers to the Lancefield

Group based on its antigenic structure. Streptococcus pyogenes-hemolytic streptococcus

-. on the basis of its sensitivity to the antibiotic bacitracin. The most important of the non-hemolytic streptococcus is enterococci such as Enterococcus and fecal Enterococcus faecium

Prior to the 1990s, these bacteria were classified into

genus Streptococcus, and molecular-biological methods

showed that they are far enough from other streptococci >> << reason for placement in their family. As their name suggests, these bacteria

can be found in the intestine and can grow in the presence of bile salts.

Reclassification of these bacteria is a good example of how molecular biology

reconstructs the old classification system, but

This is not the most extreme example. Unicellular eukaryotes of the genus Cryptosporidium

for many years was screened with the simplest

based on its microscopic appearance and other natural features. Molecular studies have shown that this classification can not be fully

necessary, because from an evolutionary point of view, these organisms

much more closely related to fungi than they are the simplest, and so

Cryptosporidia were classified in the Kingdom! . << >>

Examples should be obtained and installed in ...

What Escherichia coli? Koliformni a wide class of bacteria in the environment, including human feces and so warm-blooded animals. Availability koliformnyh bacteria in drinking water may indicate the possible presence of harmful pathogens. Why use coliforms to indicate the water quality? Drinking water should be free from pathogenic organisms, called pathogens. Pathogens can be viruses, protozoa and bacteria. Aquatic pathogens causing diseases such as hepatitis, giardiasis, and dysentery. To really test the water for specific harmful viruses, protozoa and bacteria are very time consuming and expensive. In addition, not all laboratories are equipped with water and approved to do testing is necessary. Thus, testing water for specific organisms is limited to investigations of specific water disease outbreaks. Intestinal bacteria are used as indicators of water quality for two main reasons:

koliformnyh presence of bacteria in water indicates possible contamination and potential risk to health. Sample containers can be lifted in all offices of health district in normal working hours. Request bacteriological or koliformnyh analysis. Samples must be received and installation within 30 hours of trial and stored in a cool place during transport. When collecting samples care not to contaminate the sample container. Back to the crane where you draw your drinking water and remove aerators, screens and other strattera dosing devices. Turn on the water at moderate flow and let run for at least 3 minutes. No change in flow, take your sample. Leave a ½ inch air space at the top of the bottle. Close the bottle and return it to the laboratory as soon as possible. Drinking water is analyzed for coliforms will be presented as satisfactory (no coliforms) or unsatisfactory (coliforms present). If drinking water tested unsatisfactory, you should have received information on how to treat your health. If you have not received this information, please contact 460 4206 lab or environmental health department at 460 4205. Information can be sent to you by post or instructions can be provided on request. If drinking water tested unsatisfactory, it may be contaminated with pathogenic organisms. It is important that you not drink water, and that appropriate action until the problem is fixed. One option is to get bottled water from safe sources on a temporary basis. Another option is to boil water vigorously for 3-5 minutes to make it safe from bacterial contamination. If the stick is not present in your drinking water samples (you get a satisfactory result), it means that your and probably free of pathogens in the sample. Make sure your water tested annually, more often if you notice a change in taste and odor of water, or if there are changes in the environment of your region and management (eg, floods). Protection from possible contamination as important. For more information and / or assistance, please contact the Department of Environmental Health on 460 4205 or BFHD laboratory at 460 4206. .