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6 -- Part 1: Microbial Growth
As a nurse in a plastic surgery clinic, you teach patients how to care for their sutures.
You tell patients to wash their hands, to wash around the surgical site with soap and water, and to use hydrogen peroxide to clean the wound.
One day a patient called, worried that the hydrogen peroxide caused her wound to bubble.
On page 155, you can read about catalase.
Although individual cells double in size during their lifetime, this change is not very significant compared with the size increases observed during the lifetime of plants and animals.
Manybacteria survive and grow in poor environments.
The one described in the Clinical Case is associated with biofilms.
Microbial populations can grow quickly.
We can determine how to control the growth of microbes that cause diseases by understanding the conditions necessary for their growth.
We can learn how to encourage the growth of helpful microbes.
In this chapter, we will look at the physical and chemical requirements for the growth of microbes, the various kinds of culture media, the phases of growth, and the methods of measuring growth.
The rod causes bright red colonies when thebacteria grow at room temperature.
The preferred Control and Prevention (CDC) in Atlanta, Georgia, has a temperature range.
The pH of culture media is controlled.
It seemed that large amounts of everything were needed for growth.
Micro bial growth can be divided into two main categories: survival and growth in a given environment.
It depends on its metabolism.
Sources of carbon, nitrogen, sulfur, phosphorus, oxygen, trace and their maximum and minimum growth temperatures are elements and organic growth factors.
They don't grow well at the high and low temperature extremes.
Somebacteria are capable of growing.
There are three primary groups for microorganisms.
optimum growth is represented by the peak of the curve.
Some species decline faster than others.
Some zones may produce toxins from rapid growth ofbacteria.
Some may grow.
The most common type of microbe is the mesyphilic one, which has an optimum growth temperature of 25-40degC.
Organisms that have adapted to live in the bodies of animals have an optimum temperature.
The band shows a deep temperature that grows well below freezing.
The pan of rice with a depth of 15 cm (6 in) is the most likely temperature range for about 5 hours.
They grow well at refrigerator temperatures with a shallow pan and a deep pot.
A cell is in a solution.
If the concentration of solutes such as NaCl cell is equivalent to a solute concentration in the surrounding medium, it is higher.
The cell is not growing.
The number of foods that can be used in a clinical culture is usually set at about 10.
Most of the common spoilage is preserved by acids produced by disease organisms.
The organisms capable of growth are tolerant of acidity.
Many of these organisms have optibacteria, which are found in the drainage water from coal mines and can survive at a pH 1.
It is possible for mold and yeasts to grow over a greater range of temperatures than can be found in the thermal waters of hot springs.
Under 45degC, alkalinity also acts.
It is rarely used to preserve food.
acids produced by elevated storage tempera interfere with their own growth.
These thermophilicbacteria are not included in the growth medium because they are not buffers.
A public health problem was considered by the peptones.
The advantage ofphosphate salts is that the temperature can rise quickly.
The Archaea has some microbes that havebacteria.
An optimum growth temperature of 80degC or higher is provided by them.
Most of these organisms live in hot springs that are associated with volcanic activity, and most of them get most of their nutrition from solu tant in their metabolism.
There is a record for the water.
Their composition is 80-90% water and they require water for growth and replication at high temperatures.
tion of solutes is higher in a solution with a concentra ocean that prevents water from boiling than in a cell with a concentra ocean.
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