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- At the health center, a fecal sample was taken from a feverish student. Organisms with corkscrewlike flagella and no endomembranes but with cell walls that lack peptidoglycan were isolated as the cause for the illness. These organisms probably belong to the group: a. chlamydias. b. spirochetes. c. Euryarchacota. d. Cyanobacteria. e. Archaea.There have been recurring cases of mad-cow disease in the United Kingdom since the mid-1990s. Mad-cow disease is caused by a prion, an infectious particle that consists only of protein. In 1986, the media began reporting that cows all over England were dying from a mysterious disease. Initially, there was little interest in determining whether humans could be affected. For 10 years, the British government maintained that this unusual disease could not be transmitted to humans. However, in March 1996, the government did an about-face and announced that bovine spongiform encephalopathy (BSE), commonly known as mad-cow disease, can be transmitted to humans, where it is known as variant Creutzfeldt-Jakob disease (VCJD). As in cows, this disease eats away at the nervous system, destroying the brain and essentially turning it into a spongelike structure filled with holes. Victims experience dementia; confusion; loss of speech, sight, and hearing; convulsions; coma; and finally death. Prion diseases are always fatal, and there is no treatment. Precautionary measures taken in Britain to prevent this disease in humans may have begun too late. Many of the victims contracted it over a decade earlier, when the BSE epidemic began, and the incubation period is long (VCJD has an incubation period of 10 to 40 years). A recent study concluded that 1 in 2,000 people in Great Britain carry the abnormally folded protein that causes VCJD. In spite of these numbers, the death rate from VCJD remains low. It is not clear whether this means that the incubation period for the disease is much longer than previously thought, or whether they may never develop the disease. How can a prion replicate itself without genetic material?Flagellated microbe, a mutualist found in termite intestines, makes cellulase O Taenia_ O Trichomonas_ Trypanosoma_ O Trichophyton_ Trichonympha_
- The source of an infection is isolated in a laboratory. Using an electron microscope, the pathologist notices a cell wall, genetic material, two flagella, but no nucleus was observed What type of pathogen caused thes anfection? O Protozoan O Fungus O Bacteria O Viruspartor the normal mlcroblota tnroughout one's life. Bacteria that have a parasitic relationship with their human host. Question 3 A patient suffers from conjunctivitis due to E. coll moving from the colon to the eye. What type of Infection does this describe? O An opportunistic infection that is the result of introducing normal flora into an unusual site in the body. O Aresident infection that is the result of introducing normal flora into an unusual site in the body. O An opportunistic infection that is the result of suppressing the immune system. O Atraditional infection tthat is the result of introducing normal flora into an unusual site in the body. Question 4 mobility-print-cli.msi mobility-print-cli.. IMG 6845.jpg MacBook AirA major difference between exotoxins and endotoxins is that endotoxins are _____. View Available Hint(s) for Part C able to kill cells directly not actually toxic physically part of the bacterial structure secreted by bacteria
- Communicable diseases caused by microbes must have A portal of exit only O A portal of entry only Both a portal of entry and a portal of exit O Neither a portal of entry nor a portal of exit MacBook Air 80 000 000 F8 F7 F6 F4 F5 F3The image below is an example of O Bacteria O Fungi O Virus O HelminthsExotoxins can be the following EXCEPT: Othey are LPS/lipopolysacharride O they are proteins they are made by bacteria growing in our bodies O they are secreted and act OUTSIDE the bacteria
- As the immune system increases fluids in a tissue resulting in swelling and increased mucus production during infection a bacteria will utilize to maintain themselves in a patient's tissue. Salmonella would utilize these to maintain themselves in the gastrointestinal tract and not be pushed out of the host by peristalsis. O Adhesins O Exoenzymes O Endotoxins O Exotoxins O None of the above applyQUESTION 3 Which BEST describes why it is difficult to develop antiviral drugs? Oa Antivical drugs are vory easy to develop and have no sido effects. Ob. Viruses are too small to be targeted by drugs Oc Viruses are hard to target because they use the host cell's enzymes and ribonomes to metabolize and roplicate Od. Viral infections usually clear up on their own with no problems QUESTION 4 Which of the following has ylelded microbes that produce compounds with the most antimicroblal activity? O sll the arctic O human GI tract the oceanEubacteria can be found in almost any type of environment and are non- pathogenic True False Measles is an example of a disease caused by a bacterium. True False Clear sel Clear sel