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 Bacilli (or bacillus for a single cell) are rod-shaped bacteria. 2  Spirilla (or spirillum for a single cell) are curved bacteria which can range from a gently curved shape to a corkscrew-like spiral. 3  Many spirilla are rigid and capable of movement.he three basic bacterial shapes are coccus (spherical), bacillus (rod-shaped), and spiral (twisted), however pleomorphic bacteria can assume several shapes. Shape of Bacterial Cell.