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! . << >>