Query: NC_010163:63209 Acholeplasma laidlawii PG-8A chromosome, complete genome Lineage: Acholeplasma laidlawii; Acholeplasma; Acholeplasmataceae; Acholeplasmatales; Tenericutes; Bacteria General Information: Acholeplasma species are widely distributed in the nature and can be detected and isolated from different plant, avian, and mammalian sources. Acholeplasma laidlawii is found in soil, compost, wastewaters, cell cultures as well as in human tissues and in many animal species (birds, bovine, goat, equine, ovine, porcine, feline, rodent, primates). Acholeplasma laidlawii is capable of synthesizing glucose using a pyrophosphate-dependent 6-phosphofructokinase which has also been detected in other acholeplasmas (a good example of flexible metabolism). Additionally, Acholeplasma laidlawii and phytoplasmas are the only mollicutes known to use the universal genetic code, in which UGA is a stop codon.
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General Information: Bartonella henselae str. Houston-1 (ATCC 49882) was isolated from human blood in Houston Texas. Causative agent of cat scratch fever. This group of alpha proteobacteria are unique among pathogens in that they cause angiogenic lesions. This organism was identified as the causative agent of cat scratch fever, a disease found commonly in children or in immunocompromised adults. The proliferation of the vascular endothelium (bacillary angiomatosis) is characterisitic of Bartonella infection and results in multiplication of the bacterium's host cells. Infected macrophages are stimulated to release vascular endothelial growth factor (VEGF) and interleukin 1 beta, both of which promote angiogenesis. Endothelial cells are also stimulated to grow and divide by direct contact with bacterial cells. In addition, programmed cell death (apoptosis) of endothelial cells is inhibited, combatting a common mechanism eukaryotic cells use to deal with bacterial infection. Other pathogenicity factors include pili and outer membrane adhesins for attachment to host cells.