Carlos Chagas (1879-1934) - discovered the blood-sucking bug Trypanosoma cruzi that causes Chagas disease. Chagas would be a young Brazilian doctor who first described the sickness that now bears his name. He was working Lassance in Brazil, where many railroad workers were succumbing to infectious diseases like malaria, yellow fever, as well as an undiagnosed illness. They presented symptoms such as irregular heartbeats. Chagas observed household infestations of microbes dubbed "kissing bugs" - what are named as because they come out at night and bite people around the face to feast on their blood. He set out to prove why these microbes were causing the illness.
Carlos Chagas (1879-1934) - discovered the blood-sucking bug Trypanosoma cruzi that causes Chagas disease. Chagas would have been a young Brazilian doctor who first described the sickness that now bears his name. He was working Lassance in Brazil, where many railroad workers were succumbing to infectious diseases such as malaria, yellow fever, as well as an undiagnosed illness. They presented symptoms for example irregular heartbeats. Chagas observed household infestations of microbes dubbed "kissing bugs" - what are known as because they come out at night and bite people about the face to feast on his or her blood. He attempt to prove that these microbes were causing the disease.
He examined the gut flora of such blood-sucking bugs having a simple light microscope and observed a flagellated protozoan. He also took blood samples from people and detected the parasite in the blood of the three-year old girl who received a fever and died after being bitten through the "kissing bugs." And so the hyperlink between microbe and disease was developed.
Lev Fishelson (Professor Emeritus with the Department of Zoology, Tel Aviv University)- discovered the Epulopiscium fishelsoni bacterium in 1985, a giant inside bacterial world. It's among the largest bacterium known and can be seen with all the naked eye. It is about the size of an period on the end of a sentence, if you are being a bug, that's huge. Fishelson observed the bacterium inside guts of sturgeon fish.
Lev Fishelson (Professor Emeritus at the Department of Zoology, Tel Aviv University)- discovered the Epulopiscium fishelsoni bacterium in 1985, a giant inside bacterial world. It's one of the largest bacterium known which enable it to be seen using the naked eye. It is about the size of your period in the end of your sentence, so if you are a bug, that's huge. Fishelson observed the bacterium inside guts of sturgeon fish.
Alexandre Yersin (1863-1943) - among the discoverers of Yersinia pestis, the bacterium that triggers Bubonic plague. The French-born Swiss bacteriologist was studying a plague epidemic that had broken outside in China. He isolated the bacterium and observed which it lived in rats, and that fleas from your rats were transmitting the disease to people.
Harald zur Hausen (German Cancer Research Centre) - the German virologist discovered the role of papilloma viruses in cancer of the cervix, and was awarded the 2008 Nobel Prize for Physiology or Medicine for his work. He identified DNA from human papilloma viruses (HPV) in cervical tumours, making it the link that HPV caused the cancer. This went up against the prevailing dogma within the 1980s that herpes simplex was the main cause. His work allowed others to build up vaccines which are now routinely given.
Part 1 is available here