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.
Pathogenic E. coli strains are categorized into pathotypes. Six pathotypes are associated with diarrhea and collectively are referred to as diarrheagenic E. coli. The types of E. coli that can cause diarrhea can be transmitted through contaminated water or food, or through contact with animals or persons.ix pathotypes are associated with diarrhea and collectively are referred to as diarrheagenic E. coli. The types of E. coli that can cause diarrhea can be transmitted through contaminated water or food, or through contact with animals or persons.