Definition of courier: An individual responsible for the exchange of items between two or more parties. Couriers are usually employed by a company that charges a flat rate to the party using the courier service. Federal Express, UPS, DHL, and the United States Post Office all employ couriers to deliver mail and packages.
At least 3 bacterial morphotypes, as well as fungal mycelia, thelastomatid nematodes, and ingested material are found in the hindgut. At annual molt, the lumen bacteria virtually disappear; presumably they are replaced from anterior gut regions, ingested exuvium, and ingested soil.
The three basic bacterial shapes are coccus (spherical), bacillus (rod-shaped), and spiral (twisted), however pleomorphic bacteria can assume several shapes. Shape of Bacterial Cell. 1  Cocci (or coccus for a single cell) are round cells, sometimes slightly flattened when they are adjacent to one another.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.