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MT Chp.21
| Question | Answer |
|---|---|
| What is the smallest free living microorganism? | Mycoplasmas |
| What is the morphologic shape of micoplasmas? | pleomorphic |
| What is the general appearance of micoplasmas growing on an agar plate? | “fried egg” appearance |
| Why do colonies of micoplasmas look like fried eggs? | Cells in center grow into agar and Cells on periphery grow on top of media |
| Mycoplasmas lack a _________________. | cytochromes, enzymes of the Krebs cycle, and cell walls |
| Mycoplasmas have ____________ not found in other prokaryotes. | sterols |
| Walking pneumonia is a disease caused by ______. | Mycoplasma pneumoniae |
| Rocky Mountain Spotted Fever is a disease associated with the _________ mountain range. | Appalachian |
| The ecological niche of Rickittsia is _________ ___________ __________. | tick, fleas and lice |
| Rickittsia rickittsii is transmitted by a ______________. | vector |
| The Rickettsia is dormant in the ______________ of a tick and does not become active until the tick has been feeding for several hours. | salivary glands |
| Ehrlichia is another rickettsial pathogen transmitted by a ______________. | ticks |
| Name the 3 stages of the reproductive cycle of Ehrlichia. | Elementary Body, Initial Body,Module |
| The Rickettsia dies if the phagosome fuses with a ________________. | lysosome |
| Ehrlichia infections are considered _______ disease because they were not known about before 1987. | emerging |
| Do Chlamydias have peptidoglycan in their cell walls? | no |
| Chlamydias are considered _____________ parasites because they capture the host ATP. | energy |
| Chlamydias have 2 forms of development within an endosome, tiny cocci called ________________ bodies and pleomorphic _____________ bodies. | elementary; reticulate |
| Chlamydias enter the body through lacerations and are infectious to mucus cells that have cell surfice receptors to ________ bodies. | inclusion |
| Chlamydia trachomatis is the infectious agent for the most common __________ in the U.S. | STD |
| Name the 3 posible stages of Chlamydia STD. | lesion, buboes, genital elephantiasis |
| Eye infections resulting in ____________ are also possible with Chlymidia trachomatis. | Trachoma |
| Chlamydia psittaci (which has nothing to do with STD) can cause _________________. | ornithosis |
| A reservoir for Chlymydia psittaci is transmitted by _____. | birds |
| Spirochetes are coiled gram negative bacteria with unique movement appendages called ________. | axial filaments |
| Treponema pallidum is the causative agent for _____. | Syphilis |
| The transmission route for syphilis is _______. | via sexual contact |
| Untreated syphilis has 4 stages: Stage 1 forms a _______ at the site of infection. | chancre |
| Stage 2 syphilis occurs if the spirochete enters the _________________ and includes sore throat, headache swollen lymph nodes and a widespread __________that occurs even on the palms of the hands and the soles of the feet. | bloodstream; rash |
| _________ of syphilis may last as long as 30 years. | Latency |
| Stage 3 syphilis may damage or destroy any ___________, including bones where lesions called ___________ may occur. | tissue; gummas |
| Borrelia burgdorferi is the causative agent for ______. | lyme disease |
| Borrelia burgdorferi is transmitted by the _________. | to humans via a tick bite |
| Stage 1 of Lyme Disease is characterized by a ____________ at the site of infection. | red rash |
| Stage 2 of Lyme Disease has __________ and ___________ involvement. | Neurological symptoms and cardiac dysfunction |
| Stage 3 of Lyme Disease is difficult to treat because it becomes an _______________ disease. | autoimmune |
| Leptospira is transmitted by contamination with _______________ of infected animals. | urine |
| Is contamination with Leptospira common or rare in the United States? | rare |
| Vibrio cholerae is the infectious agent for ______________. | cholera |
| Vibrio cholerae is transmitted by consumption of contaminated ________________. | contaminated food and water |
| One of the hallmark symptoms for cholera is ________________ stools. | rice-water |
| Vibrio cholerae produces a 2 part toxin known as an ________ toxin. | cholera |
| Can cholera be easily treated with antibiotics? | no |
| Vibrio vulnificus is transmitted by eating ______. | contaminated shellfish |
| Does Vibrio vulnificus have a high mortality rate? | 50% |
| The most common food borne gastroenteritis in the United States is caused by the bacteria ________. | Campylobacter jejuni |
| What are classic signs of Campylobacter infection? | bloody and frequent diarrhea |
| Various virulence factors produced by Helicobacter pylori degrade the ___________ in the stomach. | urea |
| Once Helicobacter pylori reduces the mucous in the stomach, gastric acid eats away the epithelial lining in the stomach and a _____________ is formed. | ulcer |
Created by:
gmoore730
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