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.
Escherichia coli Facts and Overview. 1  E. coli are gram-negative bacteria found worldwide. 2  There are many subtypes of this bacterial species that cause a wide variety of diseases in humans. 3  The bacteria can be transmitted person-to-person and by contaminated food and water.scherichia coli Facts and Overview. 1  E. coli are gram-negative bacteria found worldwide. 2  There are many subtypes of this bacterial species that cause a wide variety of diseases in humans. 3  The bacteria can be transmitted person-to-person and by contaminated food and water.