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https://session.masteringmicrobiology.com/myct/itemView?assignmentProblemID-13999118 Chapter 9 Solve the Problem: How Clean Is Too Clean 1 of 10 Epidemiologists report that cases of childhood asthma, hay fever, and other kinds of allergies have increased over the last several decades. A number of hypotheses have been proposed to explain these observations. In 1989, British epidemiologist David Strachan suggested that the increase in immune disorders ha arisen because children are less frequently exposed to childhood illnesses. This decreased exposure is due to a number of factors. Today children have opportunities" to be exposed to communicable diseases. Moreover, improvenents in sanitation and advances in medicine have significantly reduced the rate of numerous infectious diseases in the developed world. Strachan's so-called "hygiene hypothesis has been expanded to consider children's decreased contact not only with disease-causing microbes but also with everyday microbes in homes and schools. The idea is that fewer childhood illnesses and higher degrees of personal hygiene and cleanliness have so reduced children's exposure to microbes that when the body does encounter common microbes, the immune system overreacts, thus also been applied to a wide range of other disorders that may involve the immune system, such as multiple sclerosis, type I diabetes, and inflammatory bowel diseases. causing allergies. The hypothesis has as sweeping as the hygiene hypothesis is almost impossible to experimentally demonstrate. Decreased rates of infectious diseases and better hygiene are not the only changes that our modern world has undergone. Many of today's children l ancestors grew up. For example, their diet tends to include more and household products. Lifestyle is also different: Today's children may also play a role. live in an environment that differs in other ways from the one in which their processed foods, and they may have greater exposure to chemicals through a variety of personal typically spend more time indoors than their great-grandparents did. These and other factors Part A-Too Clean Strachan suggests that fewer exposures system (allergies). According to the readings in Chapter 9, which of the following is a chemical View Available Hint(s) to childhood lnesses may lead to unintended consequences, including an increase in overreactions of the immune method to control the growth of microbes?

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Part 5) home is the best place to ascribe five- second rule

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