Biologia (bakteria, wirus)

Treponema denticola bacteria, computer illustration. This spirochaete bacterium is from the mouth of a person with periodontal disease, a disorder of...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Rotavirus particle, computer illustration. This virus particle consists of an RNA (ribonucleic acid) core surrounded by a triple layered capsid. Rotav...

Chlamydia psittaci bacteria. Computer illustration showing two life stages of Chlamydia: elementary bodies (extracellular non-multiplying infectious s...

Chlamydia psittaci bacteria. Computer illustration showing two life stages of Chlamydia: elementary bodies (extracellular non-multiplying infectious s...

Chlamydia psittaci bacteria. Computer illustration showing two life stages of Chlamydia: elementary bodies (extracellular non-multiplying infectious s...

Chlamydia trachomatis bacteria. Computer illustration showing two life stages of Chlamydia: elementary bodies (extracellular non-multiplying infectiou...

Bartonella quintana bacteria, illustration. This is the causative agent of trench fever, and was formerly known as Rochalimaea bacteria.

Bartonella quintana bacteria, illustration. This is the causative agent of trench fever, and was formerly known as Rochalimaea bacteria.

Bartonella henselae bacteria, computer illustration. This bacterium causes cat-scratch disease, or bartonellosis, and was formerly known as Rochalimae...

Bartonella henselae bacteria, computer illustration. This bacterium causes cat-scratch disease, or bartonellosis, and was formerly known as Rochalimae...

Illustration of rod-shaped bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Klebsiella, Citrobacter, Enterobacter, Yersin...

Illustration of rod-shaped bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Klebsiella, Citrobacter, Enterobacter, Yersin...

Illustration of rod-shaped bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Klebsiella, Citrobacter, Enterobacter, Yersin...

Illustration of rod-shaped bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Klebsiella, Citrobacter, Enterobacter, Yersin...

Illustration of rod-shaped bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Klebsiella, Citrobacter, Enterobacter, Yersin...

Adenovirus structure, computer illustration showing the surface structure of the virus's outer protein coat (capsid). Many adenoviruses infect the res...

Adenovirus structure, computer illustration showing the surface structure of the virus's outer protein coat (capsid). Many adenoviruses infect the res...

Adenovirus structure, computer illustration showing the surface structure of the virus's outer protein coat (capsid). Many adenoviruses infect the res...

A man with smallpox infection. This infections is caused by variola virus, a virus from Orthopoxviridae family, it is highly contagious disease eradic...

A man with smallpox infection and variola virus, a virus from Orthopoxviridae family that causes smallpox, highly contagious disease eradicated by vac...

A man with smallpox infection and variola virus, a virus from Orthopoxviridae family that causes smallpox, highly contagious disease eradicated by vac...

Rhinoviruses and rain, 3D illustration. Conceptual image showing increase in common colds caused by rhinoviruses in cold rainy season

Rhinoviruses and rain, 3D illustration. Conceptual image showing increase in common colds caused by rhinoviruses in cold rainy season

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to an epithelial cell, known as a clue cell. G. vaginalis...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to epithelial cells, known as clue cells. G. vaginalis is...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to epithelial cells, known as clue cells. G. vaginalis is...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to an epithelial cell, known as a clue cell. G. vaginalis...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to an epithelial cell, known as a clue cell. G. vaginalis...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to epithelial cells, known as clue cells. G. vaginalis is...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to epithelial cells, known as clue cells. G. vaginalis is...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to an epithelial cell, known as a clue cell. G. vaginalis...

Bacterial vaginosis. Computer illustration of Gardnerella vaginalis bacteria (rods) attached to epithelial cells, known as clue cells. G. vaginalis is...

Chlamydia infection. Computer illustration of a cell infected with Chlamydia trachomatis bacteria. Elementary bodies (EBs, small green spheres), the n...

Chlamydia infection. Computer illustration of a cell infected with Chlamydia trachomatis bacteria. Elementary bodies (EBs, small dark green spheres),...

Chlamydia infection. Computer illustration of a cell infected with Chlamydia trachomatis bacteria. Elementary bodies (EBs, small green spheres), the n...

Chlamydia infection. Computer illustration of a cell infected with Chlamydia trachomatis bacteria. Elementary bodies (EBs, small green spheres), the n...

Illustration of a multipolar neuron, a type of neuron that possesses a single axon and many dendrites. This allows for the integration of a great deal...

Illustration of a multipolar neuron, a type of neuron that possesses a single axon and many dendrites. This allows for the integration of a great deal...

An ' stylized depiction of a retrovirus, consisting of a geomic nucleic acid, RNA or DNA (here RNA, in violet), and surrounded by capsid proteins (ora...

Illustration of the concept of biological organization.

Diagram showing structure and size of a typical Rabies virus (Rhabdovirus), causing Vesicular stomatitis and certain plant virus diseases.

(NYT53) UNDATED -- May 29, 2006 -- SCI-YOGURT-GENOME -- Photo Illustration. About 5,000 years ago, cattle herders discovered how to make yogurt. Scien...

PHOTO: EAST NEWS/BSIP This scanning electron micrograph (SEM) revealed some of the ultrastructural morphologic features of a Klebsiella pneumoniae ba...

PHOTO: EAST NEWS/BSIP This electron micrograph reveals a number of RNA rotavirus virions, and a number of unknown, 29nm virion particles. A rotaviru...