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Question Answered step-by-step YES MY TUTOR Antibiotics are typically used to treat bacterial infections. However, in recent years, improper and unnecessary use of antibiotics has promoted the spread of several strains of antibiotic-resistant bacteria.The biome of the Sahara Desert, for instance, includes a wide variety of ecosystems. The arid climate and hot weather characterize the biome. Within the Sahara are oasis ecosystems, which have date palm trees, freshwater, and animals such as crocodiles. The Sahara also has dune ecosystems, with the changing landscape determined by the wind. Organisms in these ecosystems, such as snakes or scorpions, must be able to survive in sand dunes for long periods of time. The Sahara even includes a marine environment, where the Atlantic Ocean creates cool fogs on the Northwest African coast. Shrubs and animals that feed on small trees, such as goats, live in this Sahara ecosystem.Even similar-sounding biomes could have completely different ecosystems. The biome of the Sahara Desert, for instance, is very different from the biome of the Gobi Desert in Mongolia and China. The Gobi is a cold desert, with frequent snowfall and freezing temperatures. Unlike the Sahara, the Gobi has ecosystems based not in sand, but kilometers of bare rock. Some grasses are able to grow in the cold, dry climate. As a result, these Gobi ecosystems have grazing animals such as gazelles and even takhi, an endangered species of wild horse.Even the cold desert ecosystems of the Gobi are distinct from the freezing desert ecosystems of Antarctica. Antarcticas thick ice sheet covers a continent made almost entirely of dry, bare rock. Only a few mosses grow in this desert ecosystem, supporting only a few birds, such as skuasIn cases of antibiotic resistance, the infectious bacteria are no longer susceptible to previously effective antibiotics. According to the CDC, at least 2 million people in the U.S. are infected with antibiotic-resistant bacteria every year, leading to t23,000 deaths annually.”Pretty much any infection you can think of now has been identified as being associated with some level of resistance,” said Dr. Christopher Crnich, an infectious-disease physician and hospital epidemiologist at the University of Wisconsin Hospitals and William S. Middleton Memorial Veterans Hospital. “There’s very few infections that we now treat where infections caused by resistant bacteria is not a clinical concern.”MRSA, for example, is one of the more notorious antibiotic-resistant bacterial strains; it resists methicillin and other antibiotics used to treat Staphylococcus infections, which are acquired primarily through skin contact. MRSA infections occur in health care settings such as hospitals and nursing homes, where it can lead to pneumonia or bloodstream infections. MRSA also spreads in communities, especially in situations where there is a lot of exposed skin, other physical contact and the use of shared equipment — for example, among athletes, in tattoo parlors, and in day care facilities and schools, according to the CDC. Community-acquired MRSA most often causes serious skin infections.An important facet of combating antibiotic resistance is to be careful about their use. “It’s so important for us to use antibiotics intelligently,” Crnich told Live Science. “You only want to use an antibiotic when you have a clear-cut bacterial infection.”Additional resources:• Read more about the life history and ecology of bacteria from the University of California, Berkeley.• Watch: Bacteria: Energy Producers of the Future? From the National Science Foundation.• Learn how bakers and their bread are a microbial match, from NPR.1. Explain one way you would determine which Tricare plan to bill for different patients.2. Describe a scenario where a patient would be eligible for the Tricare for Life plan.3. If an active duty service member is injured on the job, who would you bill? Explain why.4. 5. bacteria, singular bacterium, any of a group of microscopic single-celled organisms that live in enormous numbers in almost every environment on Earth, from deep-sea vents to deep below Earth’s surface to the digestive tracts of humans.6. Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes. Prokaryotes are the dominant living creatures on Earth, having been present for perhaps three-quarters of Earth history and having adapted to almost all available ecological habitats. As a group, they display exceedingly diverse metabolic capabilities and can use almost any organic compound, and some inorganic compounds, as a food source. Some bacteria can cause diseases in humans, animals, or plants, but most are harmless and are beneficial ecological agents whose metabolic activities sustain higher life-forms. Other bacteria are symbionts of plants and invertebrates, where they carry out important functions for the host, such as nitrogen fixation and cellulose degradation. Without prokaryotes, soil would not be fertile, and dead organic material would decay much more slowly. Some bacteria are widely used in the preparation of foods, chemicals, and antibiotics. Studies of the relationships between different groups of bacteria continue to yield new insights into the origin of life on Earth and mechanisms of evolution.  Health Science Science Nursing Share QuestionEmailCopy link Comments (0)