Chlamydiae are gram-negative intracellular bacteria which contribute to a wide range of acute and chronic diseases. Four species are included in the genus Chlamydia: C. trachomatis, C. pneumoniae, C. psittaci, and C. pecorum. Chlamydia psittaci and C. pecorum are animal pathogens with humans becoming infected only as a result of exposure to infected animals. In contrast, C. trachomatis and C. pneumoniae infections appear to be restricted to humans, with C. pneumoniae having recently emerged as a significant cause of respiratory tract disease, with no obvious animal host.
Was this article helpful?
The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.