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Bacteria Growth and Effects 2
Transcript of Bacteria Growth and Effects 2
By: Sanjana and Jamie There are many different positive
and negative uses of bacteria.
Let's start with the good bacteria... Cheesemaking Two types of bacteria in cheese: Lactococcus and Lactobacillus.
Lactococcus=mesophilic bacterium while Lactobacillus=thermophilic
starter bacteria is used in acidification
bacteria play a big role in aging cheese Yogurt Produced by adding a "starter" of active yogurt=mixed culture of Lactobacillus bulgaricus and Streptococcus thermophilus
Produce lactic acid Bacteria can reproduce extremely fast - as fast as once per 20 min
2 types of reproduction: sexual and asexual Bacterial Reproduction Asexual Reproduction involves one parent cell
offspring is identical to parent cell
bacteria splits into 2
each has a duplicate copy of parent genes Sexual Reproduction involves two parent cells
offspring gets some of both parents' genes
parent bacteria join
both go through binary fission Just like all living organisms, bacteria need certain conditions to survive. They also have means of protecting themselves from danger. Survival Needs Autotrophic bacteria
usually requires oxygen Defense Mechanisms hostile environments
protects genetic material
endospore reopens if conditions are right When people hear the word bacteria, they usually assume that it's bad, but that's not true. Most bacteria are very beneficial to us and impact our world in many ways. Bacteria and the World Bacteria help us in food, fuel, and medicine production
natural recyclers of our planet
produces methane and helps in nitrogen fixation
Bacteria in milk produces sour cream, cheese, and yogurt
Bacteria in our bodies digest food and protect us from invading bacteria Bacteria in our digestive tract Foul Odors bacteria cause body odor
glands release sweat when stressed
bacteria feed on this Infection=process in which bacteria, viruses, fungi or other organisms enter the body, attach to cells, and multiply
Antibodies= proteins produced by immune system. Some are targeted to attack specific microbes (A.K.A humoral immunity)
The immune system's responses may fail if germs are too numerous
Some microbes can "get rid of" antibodies Wound Infections Pathogenic bacteria cause diseases
Disease/illness can be caused by:
-person to person
-animal to person
-mother to unborn child
-Food contamination Diseases/Illnesses 1/3 of bacteria in the gut are members of the Bacteroides specie
100 trillion bacteria cells in digestive system
Number of individual species= 300-1000
Special coating disguises bacteria from immune system
Produce enzymes that digest the polysaccharides in plant cell walls
Make vitamin K and vitamins from the B group (difficult to obtain from food)
Maintain pH and stimulate immune system Digestive System Causes:
infection with Group A Streptococcus (GAS) bacteria
invades the pharyngeal tissue and causes a localized inflammatory reaction.
drink lots of water
penicillin Strep Throat Causes:
caused by consuming food or water contaminated with Vibrio cholerae
municipal water supplies
foods and drinks sold by street vendors
raw/uncooked fish or seaweed
use disinfected water
vaccine Cholera Causes:
caused by R. rickettsii
bacteria is transmitted to humans by an infected tick vector (carrier)
Parents should check for lice in their children
Doxycycline - antibiotic Rocky Mountain Spotted Fever Causes:
Usually caused by Salmonellae typhi bacteria
contracted by the ingestion of contaminated food or water
Wrong dietary habits and faulty lifestyle promotes typhoid fever.
dispose of sewage
Ciprofloxacin - antibiotic Typhoid Diseases/ Illnesses
Caused by Bacteria Although most bacteria are beneficial, there are some harmful bacteria too. Let's look at a few... When you hear the word "bacteria'', what comes to mind? Are they harmful, like viruses? Or are they important and necessary in our daily lives? Are bacteria friend or foe? "Bacteria." Bacteria. N.p., n.d. Web. 27 Sept. 2012. http://www.lanesville.k12.in.us/lcsyellowpages/tickit/carl/bacteria.html
Bailey, Regina. "Bacteria: Friend Or Foe?" About.com Biology. N.p., n.d. Web. 27 Sept. 2012. <http://biology.about.com/cs/bacteriology/a/aa032504a.htm>.
"Useful And Harmful Effects Of Bacteria?" Blurtit. N.p., n.d. Web. 27 Sept. 2012. <http://www.blurtit.com/q821612.html>.
Howe, Jess. "The Role of Bacteria in Making Cheese." Helium. Helium, 01 Aug. 2009. Web. 27 Sept. 2012.
David B. Fankhauser. "YOGURT MAKING ILLUSTRATED." Making Yogurt. N.p., n.d. Web. 27 Sept. 2012.
"ABPI - Resources for Schools." How Pathogens Cause Disease. N.p., n.d. Web. 27 Sept. 2012. <http://www.abpischools.org.uk/page/modules/infectiousdiseases_pathogens/pathogens8.cfm?coSiteNavigation_allTopic=1>.
Trimarchi, Maria. "Do Bacteria Cause Body Odor?" Discovery Health. N.p., n.d. Web. 27 Sept. 2012.
"DermNet NZ." Wound Infections. N.p., n.d. Web. 27 Sept. 2012. <http://dermnetnz.org/bacterial/wound-infection.html>. Credits "Human Diseases and Conditions." Infection. N.p., n.d. Web. 27 Sept. 2012. <http://www.humanillnesses.com/original/Her-Kid/Infection.html>.
CNN. Cable News Network, 20 July 2011. Web. 27 Sept. 2012. <http://www.cnn.com/HEALTH/library/infectious-diseases/DS01145.html>.
Senior, Kathryn. "Friendly Bacteria in the Digestive System." - Types Of Bacteria. N.p., Aug.-Sept. 2012. Web. 27 Sept. 2012.
Balentine, Jerry R. "Typhoid Fever History, Treatment, Causes, Symptoms, Vaccine - MedicineNet." MedicineNet. N.p., n.d. Web. 27 Sept. 2012. <http://www.medicinenet.com/typhoid_fever/article.htm>.
"Symptoms of Typhoid Fever: Cure, Causes and Treatment of Typhoid." Symptoms of Typhoid Fever: Cure, Causes and Treatment of Typhoid. N.p., 11 Mar. 2008. Web. 27 Sept. 2012. <http://www.tandurust.com/natural-home-remedies/typhoid-fever.html>.
"Cholera: Causes, Symptoms, Treatment, and Prevention." WebMD. WebMD, n.d. Web. 27 Sept. 2012.
"Read What Your Physician Is Reading on Medscape." EMedicineHealth. N.p., n.d. Web. 27 Sept. 2012.
"Medical Dictionary." EMedicineHealth. N.p., n.d. Web. 27 Sept. 2012. <http://www.emedicinehealth.com/rocky_mountain_spotted_fever/article_em.htm>.
Borade, Gaynor. Buzzle.com. Buzzle.com, 11 Jan. 2012. Web. 27 Sept. 2012. <http://www.buzzle.com/articles/diseases-caused-by-bacteria.html>.
Staff, Mayo Clinic. "Definition." Mayo Clinic. Mayo Foundation for Medical Education and Research, 22 Aug. 2012. Web. 27 Sept. 2012.
<http://www.mayoclinic.com/health/typhoid-fever/DS00538/DSECTION=treatments-and-drugs>. Picture Credits http://bio1151.nicerweb.com/Locked/media/ch12/binary_fission.html
http://jackcusumano.wordpress.com/tag/bacteria/ (Hope you learned something!) Thanks for Watching!! Summary -Two types of cell reproduction: asexual and sexual
-Bacteria have many survival needs (e.g.autrophic and heterotrophic bacteria) and defense mechanisms (e.g. endospores)
-There are many positive uses/effects of bacteria (yogurt-making, cheese-making,etc.) and negative uses/effects of bacteria (illness, infection, etc.)
-Bacteria are responsible for many diseases and illnesses such as
typhoid, RMSF, cholera, and
strep throat So, what do you think?
Are bacteria friend or foe? BURP