Use of Ultraviolet Radiation to Achieve Bacteria-free Algal Culture
Bacteria.: Support bacteria - they're the only culture some people have :.
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Transcript of Bacteria.: Support bacteria - they're the only culture some people have :.
What is bacteria?
True bacteria are the oldest organisms on earth organisms made up of just one cell capable of multiplying by themselves, as they
have the power to divide some bacteria can cause diseases Sometimes they are just in the wrong place but
other times they are designed to invade our bodies!!
Bacterial infections are usually treated with a special antibiotic that only kills the bacterium that has caused the disease.
Reproduction of Bacteria
Bacteria may reproduce either asexually or sexually.
Primarily they reproduce asexually, which they accomplish by simple cell division. During this process, one cell divides into two
daughter cells with the development of a transverse cell wall.
genetic variations can occur within individual cells through recombinant
Typhoid Fever and Paratyphoid Fever
is an infectious feverish disease severe symptoms in the digestive system
caused by an infection with the bacterium Salmonella typhi, which is only found in humans and may lead to
serious illness. Salmonella typhi can only attack humans the bacterium is passed on with water and foods
and can withstand both drying and refrigeration.
Salmonella and Food Poisoning found in poultry, eggs,
unprocessed milk and in meat and water
attacks the stomach and intestines
enters the lymph tracts, which carry water and protein to the blood, and the blood itself
Symptoms:- Diarrhea (constipation),
headaches, stomach cramps, nausea and vomiting
Anthrax
a bacterial disease caused by an organism called Bacillus anthracis
is capable of producing spores
It’s a disease of grass-eating animals such as sheep, goats, cattle and horses so humans won’t get infected unless they are exposed to infected animals
Symptoms: - Vomiting, nausea, fever
IT IS NOT CONTAGIOUS!
Botulism serious paralytic illness caused by a
nerve toxin produced by the bacterium
Clostridium botulinum (found in soil)
can’t be detected unless diagnosed (ex: a cat scan)
110 cases of botulism each year Clostridium botulinum
name of a group of bacteria rod-shaped organisms grow best in
low oxygen conditions. bacteria form spores - allows them
to survive in a dormant state
Types of Botulism
Foodborne botulism caused by eating foods that contain the botulism toxin (25% of the cases)
Wound botulism is caused by toxin produced from a wound infected with Clostridium botulinum (72% of the cases)
Infant botulism is caused by consuming the spores of the botulinum bacteria, which then grow in the intestines and release toxin
NOTE: ALL TYPES ARE FATAL AND SHOULD RECEIVE MEDICAL ATTENTION!!
The Plague
The Black Death wiped out complete villages in Europe in the 14th century. Largest outbreak of a bacteria.
The epidemic lasted about 200 years and affected all aspects of social and economic life.
Carried by fleas, rodents and humans.
Gram Positive (+)
Gram positive bacteria have simple walls composed primarily of peptidoglycan
Secrete exotoxins which can infect a host without the bacteria actually being present
Gram Negative (-)
Gram negative bacteria have relatively complex walls with lipopolysaccharides which are often toxic, making the walls of gram-negative bacteria toxic
Often more resistant than gram positive Bacteria to antibiotics
Usually more deadly than gram-positive bacteria, but must be present for symptoms to occur. Do not secrete exotoxins
Good Bacteria:
Used in soil enrichmentUsed for pickling and preservingUsed for fermentationUsed to decompose organic wasteThe bacteria that live within us, help to
build and maintain a strong gastrointestinal barrier against invasion and damage by pathogenic bacteria, viruses, protozoa and toxic substances.
Lactobacillus reuteri
Bacteria is a part of everyday life
The bacteria that live within us as symbionts, help to build and maintain a strong gastrointestinal barrier against invasion and damage by pathogenic bacteria, viruses, protozoa and toxic substances.
Antibodies
An antibody is a protein complex used by the immune system to identify and neutralize bacteria
Each antibody recognizes a specific antigen unique to its target
Antibodies that recognize bacteria mark them for ingestion by macrophages.
Together with the plasma component complement, antibodies can kill bacteria directly.
Antibiotics
Drugs that help cure certain infections by impairing bacteria.
First antibiotic discovered was penicillin.Some fungi produce antibiotics used to
treat bacterial infectionsThe dark side is that antibiotics caused the
evolution of antibiotic-resistant populations of the very bacteria the drugs were meant to kill