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.or rod-shaped or filamentous bacteria, length is 1-10 Âµm and diameter is 0.25-1 .0 Âµm. 1  E. coli, a bacillus of about average size is 1.1 to 1.5 Âµm wide by 2.0 to 6.0 Âµm long. 2  Spirochaetes occasionally reach 500 Âµm in length and the cyanobacterium. 3  Oscillatoria is about 7 Âµm in diameter.