Tag Archives: bacteria
Paranoia 101 – where is it safe to put your hand?
A recent experiment mapped the bacterial travellers on the New York Subway system and found that grabbing a handrail transmits the same number of bacteria as shaking hands with 10 000 people. An average of 2 million colony forming units were found per square inch, which for frequent travellers, equates to 900 times more than airplane […]
Why do Gram positive and Gram negative bacteria show different antibiotic susceptibility patterns?
The terms Gram positive and Gram negative are commonly used to describe bacteria. The main difference between the two is the structure of their cell wall which changes their susceptibility to different antibiotics. The separation also loosely fits the location of these organisms in the body – Gram negative organisms predominate in the bowel (eg. […]