Environmental Hazards What are toxicants and how do they affect living organisms? According to Dr. Celine Godard, toxicants and toxins both reference substances that are toxic; however, toxins are made in nature (like in poisonous mushrooms or in the poisonous venom that snakes use to kill their prey) and toxicants are human made (Godard, et al., 2001). Examples of toxicants would be "industrial waste products and pesticides" -- along with pollutants that
The virus genome covered by the capsid penetrates the host cell. Once inside, the virus is uncoated as the envelope and capsid are removed. Free of its covering, the viral genome (DNA or RNA) proceeds with biosynthesis. Newly assembled viral particles are released by budding. Components of viral envelopes (i.e., lipids, proteins, and carbohydrates) are obtained from the plasma or nuclear membrane as the viruses leave the cell. Budding
Categories of Antimicrobial Agents Differentiating between viruses and bacterial infections is absolutely critical to give a patient adequate treatment. Antibiotics such as penicillin and its derivatives will not work on a viral infection. Not only are antibiotics ineffective against viruses; they are actually harmful given that overuse of antibiotics can give rise to antibiotic-resistant infections, both in the patient and in society as a whole. Primary care providers are on the
Bacterial Effects on the Body Some bacteria produce a toxin that causes a flaccid paralysis, while other bacteria produce a toxin that causes all of the skeletal muscles to contract at the same time. In understanding these effects that such bacteria can have on the human body, one can begin to fully understand the root causes of these bacterial toxins as well as the full extent to which these toxins can
Introduction In recent years, the use of face masks has become increasingly common, especially in light of the global COVID-19 pandemic. While face masks are essential for preventing the spread of viruses and bacteria, their prolonged use can also contribute to the accumulation of microbes on the mask's surface. This has raised concerns about the potential bacterial contamination of face masks and the associated health risks. Studies have shown that bacteria can
The morphological properties of the virion are non-enveloped, with isometric Necleocapsids 27 nm in diameter. The symmetry is icosahedral, with the Nucleocapsids round in shape. Further, there are 12 capsomers per neucleocapsid (ICTV). Additionally, the virions each hold one molecule of linear positive-sense single stranded RNA, with a total genome length of 7500 nt, and a hairpin structure (ICTV). Treatment and Prevention: The impact of the Hepatitis a can vary from
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