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The genetic material of viruses is more varied ssrna

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The genetic material of viruses is more varied: ssRNA, dsRNA, ssDNA or dsDNA. Only DNA viruses can become prophages by inserting their DNA into the DNA of the organisms that they infect. Image: DNA Animation , Brian0918 From the Virtual Microbiology Classroom on ScienceProfOnline.com Hidden Viruses
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Modified “Live” Virus Vaccines vs “Killed” Viruses Vaccines Modified live virus vaccines contain viruses that have been weakened (attenuated) in virulence, yet retain their antigenic properties to prompt an immune response. MLV vaccines must replicate after inoculation to produce enough antigen to produce an immune response. Advantages : - One dose - Quicker immune response - Stronger, more durable response - Fewer post-vaccine reactions Killed virus vaccines contain viruses that have been treated by chemical or physical means to prevent them from replicating in the vaccinate. Advantages : - Safer - No possibility for reversion - Recommended for pregnant animals - Stable in storage Disadvantages : - Possible reversion to virulence - Possible viral shedding - Not recommended for pregnant animals - Improper handling may inactivate Disadvantages : - Multiple doses required - Weaker immune response - Shorter duration immune response - Hypersensitivity reactions more common From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Confused? Here are links to fun resources that further explain Microbiology: Viruses: Meet the Microbes Main Page on the Virtual Microbiology Classroom of Science Prof Online . HIV Replication animation and quiz from McGraw-Hill. Play “ Sneeze ”, an online game where the object is to infect as many people as possible with your coughs and sneezes. Play Pandemic 2 a video game of strategy, where you try to become a successful pandemic microbe and infect the world. My 14- year old daughter and I recommend this one to you. “Quarantine” a scary movie about a new infectious disease. “Comparison of Cold & Flu Symptoms” , article, by T. Port. Catch My Disease song by Ben Lee. . (You must be in PPT slideshow view to click on links.) From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Homework Assignment At the end of some lectures, I will give you some type of homework to evaluate your understanding of that day’s material. This homework will always be open-book. Today you will be given an essay question on the topic of Prophage Viruses This assignment is due at the at the start of class, next time we meet for lecture. From the Virtual Microbiology Classroom on ScienceProfOnline.com See the ScienceProfOnline Virtual Microbiology Classroom Cell Structure: Prokaryotes lecture for a printable Word .doc of this assignment. Image: HIV viruses budding off of infected lymphocyte, PHIL #10000
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Are microbes intimidating you? Do yourself a favor. Use the… Virtual Microbiology Classroom ( VMC ) ! The VMC is full of resources to help you succeed, including: practice test questions review questions study guides and learning objectives You can access the Virtual Microbiology Classroom (VMC) onthe Science Prof Online website www.ScienceProfOnline.com Images: HIV , Giant Microbes; Prokaryotic cell , Mariana Ruiz
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