Thus, the lifecycle of " C . pneumoniae " is divided between the elementary body, which is able to infect new hosts but cannot replicate, and the reticulate body, which replicates but is not able to cause new infection.
12.
Studies on the growth cycle of " C . trachomatis " and " C . psittaci " in cell cultures " in vitro " reveal that the infectious elementary body ( EB ) develops into a noninfectious reticulate body ( RB ) within a cytoplasmic vacuole in the infected cell.
13.
In 1844, Jackson gave the meaning of'metalloid'as'like metals, but wanting some of their properties .'In 1845, in " A dictionary of science, literature and art ", Berzelius'classification of the elementary bodies was represented as : I . gazolytes; II . halogens; III . metalloids ('resemble the metals in certain aspects, but are in others widely different'); and IV . metals.
