Bacteria

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Salmonella Bacteria cell
April 4, 2019

Salmonella Bacteria cell

More About Intracellular Infection By Salmonella There are many strains of Salmonella; nearly all are potentially pathogenic. The most severe illness caused by a Salmonella strain is typhoid fever, which is caused by S. typhi. Less severe forms of gastrointestinal illnesses, such as diarrhea, are caused by many other Salmonella strains and are collectively known…

Three Categories of Bacteria
March 20, 2019

Three Categories of Bacteria

You’re probably the member of a club you didn’t even know existed. According to research published this week, we all have one of three ecosystems of bugs in our guts. New Scientist explores what this surprising discovery means, and how our internal fauna might affect our everyday lives. Why might the types of bugs we carry be important? We think of our bodies…

Classes of Bacterial
March 14, 2019

Classes of Bacterial

Toxin production by pathogenic microorganisms likely serves to (i) protect against phagocytosis by predatory cells, (ii) aid in penetrating tissue barriers, () promote nutrient release, or (iv) alter cellular architecture and metabolism in ways that facilitate the establishment of a niche for colonization and replication. Useful enzymatic targets for some bacterial…

Cell membrane of Bacteria
February 27, 2019

Cell membrane of Bacteria

There are two ways cells can get hold of the cholesterol needed for the membranes, by using food sources containing low-density lipoproteins (LDL), or by synthesising it within the cell. Defects in the cholesterol synthesis pathway can increase the likelihood of the cell breaking down through apoptosis or due to oxidative stress. Around 20-25% of the cell membrane…

Diagram of Bacterial cell
February 15, 2019

Diagram of Bacterial cell

Top It is the most common mode of asexual reproduction. The cytoplasm and nucleoid of a bacterial cell divide equally into two, following replication of DNA. The cell wall and cytoplasm also split resulting in the formation of two daughter cells. Under favourable conditions, a bacterial cell divides by fission once in every 20 minutes. fig. 8.4 - Fission in Bacteria…

Characteristics of Bacterial and Fungal
January 25, 2019

Characteristics of Bacterial and Fungal

Mushrooms are often mentioned as examples of fungi but a mushroom is really part of a fungus. Mushrooms are the fleshy spore-bearing fruiting bodies of many species of gilled fungi. That is, they are the reproductive part of those fungi. See Structure of Mushrooms Fungi ( plural , the singular noun is fungus) are classified within the Biological Fungi Kingdom…

Bacteria Labelled Diagram
January 13, 2019

Bacteria Labelled Diagram

A protocol to isolate bacterial colonies is a crucial tool for any life scientist to have in their toolbox. There are several different variations of a procedure called streaking (insert funny comments here.) I would like to go over one I used countless times during my studies for my biomedical engineering degree. That procedure is called the Streak Plate Method…

Plant Bacteria
December 11, 2018

Plant Bacteria

Among the extensive cortège of plant-associated microorganisms (the so-called plant microbiota), mutualistic fungal and bacterial symbionts are striking examples of soil microorganisms that have successfully coevolved with their hosts since plants adapted to terrestrial ecosystems. They promote plant growth by facilitating the acquisition of scarce nutrients…

What is Micro Bacteria?
December 8, 2018

What is Micro Bacteria?

Any part of the human body that is open to the outside world it available for the colonisation of bacteria. While this blog has covered bacteria in the and the throat, one area I ve neglected to cover is the bacteria that get into the lungs. As the company I currently work for is involved in respiratory research I was rather excited to find a PLoS One paper that…

Protein Capsule Bacteria
December 5, 2018

Protein Capsule Bacteria

To search the entire book, enter a term or phrase in the form below Custom Search Bacterial Defense against Phagocytosis © Kenneth Todar, PhD Introduction Some pathogenic bacteria are inherently able to resist the bactericidal components of host tissues, usually as a function of some structural property. For example, the poly-D-glutamate capsule of Bacillus anthracis…

Prokaryote Bacteria cells
November 26, 2018

Prokaryote Bacteria cells

Bacterial cells are fundamentally different to the cells of multicellular animals such as humans. They are far smaller, with less internal organisation and no nucleus (they have DNA but it is not packaged safely within a membrane). Because of this bacteria are almost exclusively single-celled organisms, with their own autonomy and often mobility. Of course many…

Main Features of Bacteria
November 20, 2018

Main Features of Bacteria

Bacteria are mostly unicellular organisms that lack and are among the smallest living things on earth—only viruses are smaller. Multiplying rapidly under favorable conditions, bacteria can aggregate into colonies of millions or even billions of organisms within a as small as a drop of . The Dutch merchant and amateur scientist Anton van Leeuwenhoek was the first…

Bacteria and its Parts
October 6, 2018

Bacteria and its Parts

These are three bacterial motors with different torque (units of torque are piconewton nanmometres, pN nm). Credit: Morgan Beeby/Imperial College London Many bacteria swim using flagella - long tails that are attached to tiny motors made of proteins, just tens of nanometres wide. These motors spin the flagella, which work as nanoscale propellers to drive the…

Which Bacteria have Capsule?
August 29, 2018

Which Bacteria have Capsule?

Microorganisms sense and adapt to changes in their environment. When favored nutrients are exhausted, some bacteria may become motile to seek out nutrients, or they may produce enzymes to exploit alternative resources. One example of an extreme survival strategy employed by certain low G+C Gram-positive bacteria is the formation of endospores. This complex developmental…

Key Features of Bacteria
August 11, 2018

Key Features of Bacteria

Bacteria are a subset of prokaryotes and while very different, they still have some common features. Learning Objective Identify common bacterial traits Key Points Bacteria vary from species to species, thus assigning many common traits to bacteria is difficult. Bacterial species are typified by their diversity. Not all prokaryotes are bacteria, some are archaea…

Are All Bacteria Microscopic
August 8, 2018

Are All Bacteria Microscopic

It is possible to use non-toxic stains (such as ink for fountain pens) to stain yogurt bacteria in-vivo. Can one see bacteria using a compound microscope? The answer is a careful “yes, but”. Generally speaking, it is theoretically and practically possible to see living and unstained bacteria with compound light microscopes, including those microscopes which are…

Are fungi Bacteria
July 21, 2018

Are fungi Bacteria

Credit: TheAlphaWolf Wikimedia (CC BY-SA 3.0) Getting around in dirt is not easy for bacteria. Those that can move rely on water in which to swim, but soil is full of air pockets and dry particles (boulders, no doubt, to bacteria) that block progress. New research indicates, however, that the filaments of fungi may act as highways that enable soil bacteria to…

Bacteria Groups
July 12, 2018

Bacteria Groups

Abstract: From biofilm and colony formation in bacteria to wound healing and embryonic development in multicellular organisms, groups of living cells must often move collectively. While considerable study has probed the biophysical mechanisms of how eukaryotic cells generate forces during migration, little such study has been devoted to bacteria, in particular…

Biosafety Level 2 Bacteria List
July 9, 2018

Biosafety Level 2 Bacteria List

Biological Agents, Work Practices, Safety Equipment, and Facility Design Specific to Each A very specialized research laboratory that deals with infectious agents is the biosafety lab. Whether performing research or production activities, when working with infectious materials, organisms or perhaps even laboratory animals, the proper degree of protection is of…

What is soil Bacteria?
July 6, 2018

What is soil Bacteria?

Soil bacteria and soil fungi are the start of the soil food web that supports other soil organisms and the functions of a healthy soil. Diverse populations of soil bacteria and fungi can suppress root diseases. Soil bacteria and fungi are encouraged by ground cover and organic matter inputs. Populations of soil bacteria change rapidly depending on moisture, time…

Where is DNA located in Bacteria?
April 16, 2018

Where is DNA located in Bacteria?

From the tiniest bug, to the tallest oak tree, and largest mammal, DNA certainly gets around. What is so incredible about this molecule is its similarity in structure and composition in all living things. This article takes a peek inside cells to find out where DNA is found. Human Cells Nucleus DNA can be found inside the nucleus of every cell, apart from red…

Similarity Between Bacteria and fungi
March 17, 2018

Similarity Between Bacteria and fungi

In order to survive, organisms produce small molecules known as primary metabolites which help it to grow, develop and reproduce. Examples include nucleic acid used to make DNA, amino acids to make proteins, and simple sugars. Once the organism is established it will often start to produce secondary metabolites . Secondary metabolites are not vital for survival…

Mitochondria in Bacteria
February 12, 2018

Mitochondria in Bacteria

About 1.5 billion years ago, primitive bacteria took residence inside larger cells, resulting in an intimate relationship that would mold the evolution of more complex, multicellular beings. The bigger cell was eukaryotic, meaning it contained organelles - structures surrounded by membranes, but the prokaryotic bacterial cell had no such arrangement. The bigger…

Fungus is a Bacteria
February 9, 2018

Fungus is a Bacteria

Bacteria and fungi occur in all environments. In humans, these lifeforms can be harmless passengers, participate in beneficial biological processes, or cause disease. Bacterial and fungal infections affect people of all ages and range from minor to potentially life-threatening. Bacteria and fungi have similarities and differences that influence their disease-causing…

Does Bacteria have Cytoplasm
December 10, 2017

Does Bacteria have Cytoplasm

The structures of two prokaryotic cells. The bacterium (shown at the top) is a heterotroph , an organism that eats other organisms. Cyanophytes are autotrophs , organisms that make their food without eating other organisms. Most of these prokaryotic cells are small, ranging from 1 to 10 microns with a diameter no greater than 1 micron. The major differences between…

What are the Features of Bacteria?
November 16, 2017

What are the Features of Bacteria?

Mosquitoes kill an estimated 700 people a year. If infected with viruses that cause diseases like chikungunya, dengue and Zika, mosquitos can transmit them to humans in one bite. Researchers have now pilot-deployed a new technique to control diseases transmitted by mosquitoes by making use of nature. It is one of the new tools WHO recommends for pilot deployment…

Purpose of cell wall in Bacteria
October 23, 2017

Purpose of cell wall in Bacteria

Andre G, Leenhouts K, Hols P and Dufrene YF (2008) Detection and localization of single LysM‐peptidoglycan interactions. Journal of Bacteriology 190: 7079–7086. Barak I, Muchova K, Wilkinson AJ, O Toole PJ and Pavlendova N (2008) Lipid spirals in Bacillus subtilis and their role in cell division. Molecular Microbiology 68: 1315–1327. Bardy SL and Maddock JR (2007)…

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