2006-07-09 01:05:42 · 4 answers · asked by jazz 1 in Social Science ➔ Other - Social Science
they suck the blood out of an animal which has a disease and then goes to another animal, bites that one and transferrs the disease.
The plague was spread by fleas.
Everyone thought it was rats but they were just hosts for the fleas which in turn infected people.
2006-07-09 01:10:29 · answer #1 · answered by tjrj23 4 · 0⤊ 0⤋
Fleas bite on infected animals that carry diseases. Then the fleas can bite humans and that is how diseases are spread. Ticks and mosquitos and gnats are the same way as well as flies. That is how diseases spread around. Depending on what the blood sucking critters have bitten before you, could depend on how your body reacts to the bite.
There are scores of diseases caused by bug bites. Some are curable while others aren't.
2006-07-09 04:08:15 · answer #2 · answered by Lyndee 4 · 0⤊ 0⤋
All these bugs have one way of living. They live on blood. Blood can't be ingested by them in the way it is available so they need to make it less thick so its easy for them to suck it out of the host. To do this they secrete a fluid (something like saliva) that makes blood flow easily. During this the disease causing germs enter the system of the fleas & when they get to another host the same saliva is again secreted & the germs have another host.
2006-07-09 01:56:59 · answer #3 · answered by Capndon 2 · 0⤊ 0⤋
they suck blood off one host then pass on any disease as they suck on the next host
2006-07-09 01:07:30 · answer #4 · answered by Anonymous · 0⤊ 0⤋