Mycobacterium leprae infections manifest in two different forms in a patient. What are these? What determines which form the patient will develop?
What will be an ideal response?
Mycobacterium leprae produces a disease known as leprosy in susceptible patients. The symptoms of the disease depend on the patient's cell-mediated immune response. In patients with a strong cell-mediated immune response, the patient is able to kill cells infected with the bacteria. In these individuals, the disease manifests as a non-progressive form of the disease called tuberculoid leprosy. The bacteria cause nerve damage that leads to loss of sensation in regions of skin. In patients with weak cell-mediated immunity, the bacteria multiply in the skin and nerves and gradually lead to progressive loss of facial features, digits, and other body structures. This form of the disease is known as lepromatous leprosy.
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The first species of a community are __________.
Fill in the blank(s) with the appropriate word(s).
How does transcription of sporulation genes in B. subtilis involve different sigma factors?
What will be an ideal response?
The base content of a sample of nucleic acid is as follows: A = 31%, G = 31%, T = 19%, C = 19%. What conclusion should be drawn from this information?
A) This nucleic acid is double-stranded DNA. B) The strands in this molecule are parallel rather than antiparallel. C) The purine/pyrimidine ratio in this molecule fits Chargaff's data. D) This nucleic acid is made of RNA. E) This nucleic acid is single-stranded DNA.
This term is defined as one flagella located at each end of the cell
What will be an ideal response?