Group A Streptococcus

Group A streptococcus is a Gram-positive coccus that appears to be arranged in chains under the microscope (Streptococcus pyogenes). It is responsible for a number of human diseases such as strep throat (acute pharyngitis) and skin and soft tissue infections such as impetigo and...

The biology of Coronaviruses

Coronaviruses get their name from the characteristic viral particle (virion) that looks like a corona because small protrusions are formed around their surface. This family of viruses infects various vertebrates, mainly mammals and birds, and it is considered one of the most...

Legionnaires disease: everything you need to know!

The use of air conditioning units is necessary now but it also carries some risks. Characteristically, last year two cases of celebrities brought the disease of Legionnaires or the disease of air conditioning to the news. Why does it occur? The disease is caused by the...

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