IF A PERSON IS INFECTED BY THE SAME PATHOGEN A SECOND TIME , why does the person either not get sick at all or stay sick for less amount of time ?

Q: what is the meaning of reversion to virulence

A: Mutations in virus: Due to the replication of the virus, 'copying errors' causes in random genes.…

Q: Which of the following statements about endotoxin is true? Ita) is an example of an A-B toxin.b) is…

A: Exotoxins are released by the live bacteria. The exotoxins are classified into three types. They…

Q: Classify the following concepts whether as a sign or symptom, and why? 1 - Fever 2 - Rash 3…

A: A symptom is a manifestation of disease that is visible to the patient, whereas a sign is a…

Q: Increase in body temperature should increase the rate of metabolism of microbes instead of killing…

A: A fever is a body temperature that is higher than normal. A normal temperature can vary from person…

Q: Which of the following is NOT an autoimmune disorder? a) Lupus Ob) Rheumatoid Arthritis c) HIV/AIDS

A: Introduction - A disease in which the body's immune system attacks healthy cells is called…

Q: How is an enterotoxin different from endotoxin?

A: Bacteria use various biochemicals as a defense against various drugs and the host immune system. It…

Q: Which of these statements about cat scratch disease is false?a) It is a common cause of chronic…

A: Which of these statements about cat scratch disease is false?

Q: The grouping of blood is based on substances called: A) antibodies B) antigens C) antitoxin D)…

A: Amswer is b.) Antigen.

Q: Which of the following is a difference between transient and resident microbiota?   Transient…

A: Microbiota helps to protect the intestine against colonization by pathogens. Microbiota are the…

Q: how does a fever help the body fight infections

A: Pathogens are disease-causing microorganisms that upon entering a healthy body cause illness or…

Q: Why have some diseases spread in our community, while others have vanished altogether? (connection…

A: Bacteria or viruses can spread quickly in society and make many people sick. When more people are…

Q: In Ingested poisoning and carbon monoxide poisoning, how does a person get this disease? Is it…

A: A disease is a state that renders the body or its parts malfunction.

Q: Identify a pathogen that has a significant impact on human health. What are its health effects?

A: Shigella- Various species of Shigella causes Shigellosis disease. The infected people with Shigella…

Q: Name an organism that can cause a disease in each of the three systems we have most recently…

A: Introduction:- Disease is a type of disorder that affect the physical, mental and emotional well…

Q: What do the following viral encephalitis diseases have incommon: eastern equine encephalitis,…

A: Encephalitis is a disorder that results in the inflammation of the brain tissue. It is generally…

Q: What are blood born pathogens and how can it be prevented

A: Disease-causing microorganisms are pathogens.

Q: Which of your body’s nonspecific host defenses would help fight a pathogen entering your body…

A: There are several non-specific host defense mechanisms in our body to counteract the evasion of…

Q: Vaccines are substances that confer immunity against________.a) All kind of diseases b) Communicable…

A: Each vaccine contains a small amount of the  germ (virus or bacteria) ,inactivated  or dead or parts…

Q: Which of the following statements is false?a) A disease with a long incubation period might spread…

A: The immune framework is an organization of natural cycles that shields a living being from diseases.…

Q: What would cause a local infection to spread into a pandemic so rapidly?

A: A pandemic is a global epidemic. An epidemic is when an infectious disease is widespread in a…

Q: a pathogen forms a compatible interaction with the host? true or False

A: Introduction  In the broadest definition, a pathogen is any organism or agent that can cause…

Q: In the course of disease, there is an incubation period, what happens during this period?

A: The disease is any feeling of discomfort or unpleasant feeling due to any underlying abnormal…

Q: List four benefits of fever.

A: Fever is the most common presenting complaint in the medical practice. It is defined as a body…

Q: ____________ are suspensions of killed or live germs which is employed to induce the production of…

A: Among the given options, option (a) is the most appropriate.It explains that the vaccines are…

Q: An immunizatin reduces the chance that you will catch a severecase of disease because the…

A: Immunization is the process of developing immunity against the particular pathogen by the…

Q: How can you be protected from invading pathogens?

A: A microbe is a living entity that is so tiny that it cannot be seen with the naked eye. Microbiology…

Q: At what body sites do pathogens typically attach and colonize?

A: Microorganisms or microbes are microscopic organisms that exist as unicellular, multicellular, or…

Q: Are there any similarities between infectious and chronic diseases

A: Introduction: Infectious diseases are  caused by organisms — includes bacteria, viruses and…

Q: What are three mechanisms pathogens use to block the immune system?

A: Introduction  The body's defence against infection is provided by the immune system, a vast network…

Q: For the past month, you have spent a lot of time in Florida and, while there, you decided to try eel…

A: Humans are infected with parasitic worms from the genus Gnathostoma through raw or undercooked food.…

Q: systemic infection

A: Local infections are those infections which remain in one particular area. Whereas, systemic…

Q: During a major infection, you often get a high fever because _____.

A: Major infection, you often get a high fever because

Q: Which of the following is NOT true about the transmission of diseases of the digestive system? None…

A: Digestive system diseases are medical conditions that affect the digestive organs, such as the…

Q: Your friend says, “I think I have the kissing disease. What is it?” Explain the disease to your…

A: Viral diseases are caused by viruses, a type of microorganisms. Viral diseases are contagious in…

Q: Distinguish between pathogenicity and virulence.

A: Introduction  We are surrounded by various pathogens such as bacteria, viruses, fungus etc. Every…

Q: Which stage of HIV infection does the immune system function most closely to normal?   A) Attachment…

A: The human immunodeficiency virus (HIV) is a virus that targets the immune system of the body. AIDS…

Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.