<h2>Questions which are importance to local people</h2>
<h2>Questions which are important to local people</h2>
<p>
<i>Staphylococcus aureus</i> (<i>S. aureus</i>) is a common pathogen that the enterotoxins released by it is a sever pathogenic factor of food poisoning cases. <i>S. aureus</i> doesn’t need restricted conditions to grow; It has great resistance to arid, heated and saliferous conditions, therefore spreading and surviving widely in the environment around people. <i>S. aureus</i> is ubiquitous in nature which can be found in air, water, dust and human and animal’s waste. As a result, People can easily be exposed to <i>S. aureus</i> and get infected. Nowadays, <i>S. aureus</i> has become a worldly health problem. Reported by the U.S. Centers of Disease Control, about 25% food poisoning cases are caused by <i>S. aureus</i> infection in China, about 33% in the U.S., and even about 45% in Canada. As people infected by <i>S. aureus</i>, it will cause detrimental diseases as pneumonia, pericarditis, sepsis and death. In the hospital or communities, people catch <i>S. aureus</i> through contact infection and the morbidity rate in a developed country is between 100,000 to 300,000 people each year. According to data from the Emerging Infections program (EIP) and Cerner Electronic Health Record databases, 19,832 associated deaths occurred in an estimated 119,247 <i>S. aureus</i> bloodstream infections in 2017. To understand the spreading range of <i>S. aureus</i>, we construct the following experiments.
