Population Growth Rate, Year ended 31 March 2015. 1  The preliminary estimated resident population (ERP) of Australia at 31 March 2015 was 23,714,300 people. 2  This reflects an increase of 316,000 people since 31 March 2014, and 93,900 people since 30 December 2014.
Types: Two general types of Pili are known they are: Sex pili and Common pili. Medical Importance of Fimbriae or Pili. 1  Common pili (Adhesins): They mediate the attachment of bacteria to specific receptors on the human cell surface, which is the first step in establishing infection in some organisms.2  Example: Mutants of Neisseria gonorrhoeae that do not form pili are nonpathogen. Example: Mutants of Neisseria gonorrhoeae that do not form pili are nonpathogen. 2  Sex pili (conjugation tube): It is a specialized kind of pili that forms the attachment between male (donor) and the female (recipient) bacteria during conjugation and acts as a conduit for the passage of DNA.
1 a hair or hairlike structure. 2 (in microbiology) a fine filamentous appendage found on certain bacteria and similar to flagellum except that it is shorter, straighter, and found in greater quantities in the organism. Pili consist solely of protein and are associated with antigenic properties of the cell surface.here are two kinds of pili: (a) a larger form that is hollow and found on male bacterial cells only; it is used in bacterial cell conjugation, and (b) a smaller form which is of major significance in adherence of bacterial cells to epithelial surfaces such as the intestinal mucosa or mammary gland epithelium.