If bacteria form a parasitic association with other organisms, they are classed as pathogens. Pathogenic bacteria are a major cause of human death and disease and cause infections such as tetanus, typhoid fever, diphtheria, syphilis, cholera, foodborne illness, leprosy and tuberculosis. A pathogenic cause for a known medical disease may only be discovered many years after, as was the case with Helicobacter pylori and peptic ulcer disease. Bacterial diseases are also important in agriculture, with bacteria causing leaf spot, fire blight and wilts in plants, as well as Johne's disease, mastitis, salmonella and anthrax in farm animals. COUNT 3
QSN1 What are the pathogenes? ANS1 bacteria form a parasitic association with other organisms QSN2 Can cause for most pathogenic diseases be found soon? ANS2 may only be discovered many years after QSN3 What can pathogenes cause? ANS3 human death and disease