infection belong to the phylum, firmicutes.
Streptococcus (plural) originates from a Greek word streptos, which means
that they are easily bent or twisted into chains. This bacterium is
anaerobic, occurring in pairs or twisted chains. It is non catalase in
nature, meaning they donít necessarily require oxygen to breed. They have
been subdivided into groups by antibodies. Each of the group may have one
or more species. The most common
infection are: group A, B and D. Group A
causes infectious diseases such as: pharyngitis and pneumonia. Whatís
interesting however; is that these bacteria may not always be pathogenic.
In fact, these bacteria are a fundamental ingredient for production of
Swiss cheese and yoghurt.
have been categorized on the basis of their hemolytic properties.
Hemolytic refers to the sort of reaction they have on red blood cells (RBC).
These hemolytic properties are alpha, beta and gamma. Pneumonie (what
causes pneumonia) and viridians are alpha hemolytic in nature. Pneumoniae
are the leading cause of pneumonia and other etiological diseases, while
viridians are non-pathogenic (the green stuff in Swiss cheese). Sometimes
viridians S enter our blood stream at time of tooth extractions. It is
found orally and once it gets a chance to enter our blood stream may cause
endocarditis. Strep infection
belonging to alpha have five more sub groups. These
bacteria usually affect people aged between 5-15 years. They generally do
not cause any serious infections except on those having immune
deficiencies. Whenever, streptococcus detects a weakness in immune system
which could be due to any reason or deficiency it attacks the victim.
Sometimes the elderly or infants may also get attacked by streptococcus as
they have weaker immune system then the rest.
They are the prime
originators of rheumatic fevers, toxic shocks, scarlet fevers and acute
glomerulonephrits, the latter being a complex kidney disease.
infection belonging to group D have also
been classified further. They are the members of both alpha and gamma
hemolytic. They can breed in saline water, and these types are mainly
responsible for urinary tract infections and infections caused by fecal
contamination. These usually are present in the gastrointestinal tract of
both humans and animals. Opportunist infections, such as intra abdominal
start to flourish whenever, they get a chance. Then there is the beta
hemolytic, which has been classified into six groups. Almost all of these
are pathogenic. Group A diseases are entirely dependent on the workings of
bacterium, streptococcus pyogene. Group B breeds due to
agalactiae. Four of these
types like to abode in humans, while type C and G find animal bodies
better suited for the job. Some types of Group G can still infect humans
Then we have
these minute colony Strep infection
which do not fall in any particular group. They all belong to
different groupings; they could be alpha, beta, gamma or even non-group
classification could be slightly mind boggling at first. But, it is
important to understand it as different types of bacteria show different
reactions and require adequate treatments and diagnostic tests. This is
because in some rare cases if the bacteria are not detected early on, it
may lead to further complications and could even turn out to be fatal.
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