By: Tami Port MS
Fimbriae are external structures of Gram- cells which enable bacteria to adhere to surfaces and, as virulence factors, mediate infection of host cells. Most Gram-negative bacteria have these short, fine appendages surrounding the cell. In contrast, Gram-positive bacteria lack fimbriae.* How Do Fimbriae Help...
The medical war on superbugs has only just begun
By: Lucien Beauley
Will Probiotics Replace the Increasingly Ineffective Antibiotics?On an almost daily basis both world and national news gives us an update on the increase in hospital infections that are not responding to even the best antibiotics available in our medical arsenal.Why are antibiotics becoming...
By: Omar Salvador
Most herbivorous animals - including cattle, goats, horses, and sheep - are known reservoirs of the bacterium that causes anthrax, a dangerous though uncommon zoonotic disease. Primarily a disease of the animals mentioned, anthrax usually occurs as an infection of the intestinal tract. As a...
By: Joshua Horn - 257112
Bacteriophages are viruses that infect bacteria and are among the most common organisms on the planet, if they can be classified as such. They accomplish their infection and propagation with two cycles that work in concert: the lytic cycle and the lysogenic cycle. These life...
Life cycle of bacteriophage
By: Joshua Horn - 257112
Bacteriophages are viruses that infect bacteria. They accomplish their infection and propagation with two cycles that work in concert: the lytic cycle and the lysogenic cycle. These life cycles are the driving force for the spread of bacteriophage infection. LYTIC CYCLE The lytic cycle is...
Bacterial cell wall and gram staining
By: Nzel Shrestha
On the basis of their reaction to gram stain, bacteria can be divided into two major groups- a) Gram positive bacteria b) Gram negative bacteria To understand the difference between gram positive and gram negative bacteria, it is essential to first have the knowledge of...
Spontaneous generation of life
By: Tmari
The theory that refers to spontaneous generation suggests that life may have evolved from non-living forms of matter (also called chemical evolution). Charles Darwin hypothesized that life may have evolved in the bottom of a pond. Although some of the evidence gathered to support this...
Structural differences between bacteria and viruses
By: Tami Port MS
Bacteria and viruses are often lumped into a general category of ‘things that can make people sick’. But although they can both cause illness, they are very different agents of infection.All viruses are full time ‘bad guys’; parasites which require a living...
By: Alison Bowler
Protozoa, single celled animals have evolved to exploit every ecological niche. Some are free living while others are parasitic and capable of causing severe, sometimes life-threatening, infection. A number of parasitic protozoa are intracellular parasites living within other cells. One of the major causes of...
By: Dr Pandula Siribaddana
What is a ‘protozoa’? Protozoa are unicellular organisms which are present as free living or else as parasitic organisms in another living system. There are several types of protozoa that have been identified and among them, sporazoa, flagellated protozoa, ciliated protozoa and amoeba would...

 

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