Fingers

Human fingers often transmit disease because we use them so frequently in our lives. Hands are considered vectors but gloved hands are considered vehicles. Organisms cannot infect the gloves, so gloves are usually a source. Only when a bacteria infects the hand's skin can the fingers be a vector (i.e. Syphilis sores on fingers)

Nasal Secretions
Mucous secretions can get on hands, containing Streptococci, Staphylococci, and viruses such as the flu or chicken pox.

Oral Secretions
Saliva can contain staphylococci, and can cause food poisoning if it gets in food.

Open Sores
Touching open sores with pus (such as bed sores) can pick up bacteria. Popping pimples can also pick up organisms, and touching another host can transmit the organism to that host.

Feces
Fingers can pick up traces of feces in the bathroom, especially the toilet seat. It can transfer to food, and can cause food poisoning caused by E. coli or Salmonella, and can transmit additional diseases such as hepatitis A or polio.