Lesson plan
Janibacter
Janibacter is a genus of Gram positive, nonmotile, non-sporeforming bacteria. The genus name is derived from the two-faced Roman god Janus, referring to the fact that the cells of the original strain could be rod-shaped or coccoid. The type species of the genus, Janibacter limosus, was originally isolated from sludge from a wastewater treatment plant. Other species have been isolated from an air sample, a melon, the midgut of mosquitoes, coral, sea sediment, and hydrothermal sediment. Janibacter brevis was originally classified as a separate species, but was later found to be a heterotypic synonym of J. terrae. Colonies formed on agar by members of this genus are usually cream, white, or yellow pigmented. The optimum temperature for most Janibacter species is 28 °C. The lowest temperature required for growth in the genus is 4 °C (J. terrae, J. anophelis, J. limosus), and the highest is 45 °C (J. terrae, J. anophelis, J. corallicola). The pH optimum is commonly between 7.0 and 9.0, with some species capable of growing at 5.0-12.0. All species can tolerate NaCl salt concentrations up to 7%, but J. alkaliphilus can tolerate concentrations of 17%. J. hoylei, which was recovered from high altitude air samples, is the most UV resistant. Janibacter species have been implicated in multiple cases of human infection, although most cases appeared to be opportunistic infections.…
Article summary
Janibacter is a genus of Gram positive, nonmotile, non-sporeforming bacteria. The genus name is derived from the two-faced Roman god Janus, referring to the fact that the cells of the original strain could be rod-shaped or coccoid. The type species of the genus, Janibacter limosus, was originally isolated from sludge from a wastewater treatment plant. Other species have been isolated from an air sample, a melon, the midgut of mosquitoes, coral, sea sediment, and hydrothermal sediment. Janibacter brevis was originally classified as a separate species, but was later found to be a heterotypic synonym of J. terrae. Colonies formed on agar by members of this genus are usually cream, white, or yellow pigmented. The optimum temperature for most Janibacter species is 28 °C. The lowest temperature required for growth in the genus is 4 °C (J. terrae, J. anophelis, J. limosus), and the highest is 45 °C (J. terrae, J. anophelis, J. corallicola). The pH optimum is commonly between 7.0 and 9.0, with some species capable of growing at 5.0-12.0. All species can tolerate NaCl salt concentrations up to 7%, but J. alkaliphilus can tolerate concentrations of 17%. J. hoylei, which was recovered from high altitude air samples, is the most UV resistant. Janibacter species have been implicated in multiple cases of human infection, although most cases appeared to be opportunistic infections.…
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- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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