In a species of ant, dead individuals are usually consumed by the other ants. A fungal pathogen is introduced into this species; it produces fungal spores within the host but they are not secreted by living ants or passed on to offspring. At introduction, the pathogen kills 10% of infected ants. How would you expect the virulence of the pathogen to evolve? Virulence will decline to zero. Virulence will stay the same. Virulence is expected to increase.

Q: O A contaminated catheter might be an example of an iatrogenic infection. O The size of an inoculum…

A: Iatrogenic infection, These are also known as Doctor induced infection. It is caused when a…

Q: Among hospital patients who have infections, one-third did not enter the hospital with the infection…

A: Hospitals are one of the major places where visitors have a high chance of getting many infections.…

Q: Choose all of the factors that contribute to how much a disease might spread in a population:

A: The disease in a population is spread by a pathogen in various modes of transmission. It can be…

Q: Which of the following is mismatched? O Indirect contact transmission - person-to-person…

A: Microbes or microorganisms are very small organisms which cannot be seen by naked eyes. These can…

Q: A relationship between two organisms where one organism is closely associated with its host, causing…

A: Parasitism: This option is incorrectParasitism is a relationship in which one organism (the…

Q: Arthropods transmit disease by injecting microbes when they bite a victim. This insect is classified…

A: Various insects belonging to phylum arthropoda are carriers of certain diseases like malaria,…

Q: The bacterium Staphylococcus aureus is commonly found in the nasal cavity of healthy people. If…

A: The answer is both resident microbiota and opportunistic pathogen.

Q: Which one of the following terms is NOT directly relevant to the ecology of infectious disease?…

A: Various diseases are caused by different organisms in the body. The entry of different pathogens…

Q: Parasites can move between hosts either by horizontal or vertical transmission. Why might those…

A: The relationship between two organisms wherein one organism (the parasite) thrives at the cost of…

Q: Which is a method of transmitting pathogens from one host to another by carrying microorganisms…

A: Regardless of the reservoir, transmission can occur for an infection to spread. First, transmission…

Q: The following describes which helminthic parasite? Humans ingest undercooked beef or pork containing…

A: Yersinia pestis is a type of bacteria that causes the disease known as plague. Plague is a serious…

Q: Giardiasis is an intestinal parasite that can transmitted through person-to-person contact and…

A: Giardia lamblia is an intestinal parasite in humans which causes Giardiasis.  Giardiasis is a…

Q: Describe how different mechanisms of interaction among parasites within a host (i.e. exploitation,…

A: Parasites within a host can interact with each other in different ways such as exploitation…

Q: Which of the following conditions would result in the most rapid spread of a disease through a…

A: Diseases that spread through hosts are becoming a major concern in today's world, specially keeping…

Q: Which of the following organ systems is the most heavily affected by exposure to environmental…

A: Environmental toxins, also known as environmental pollutants or toxicants, are substances present in…

Q: Injectable products must be endotoxin-free.  true or false?

A: Endotoxin is a type of pyrogen and is component of the exterior cell wall of Gram negative bacteria…

Q: True or false?  Efforts to prevent a disease are succeeding; thus, the prevalence of the disease…

A: In this question asked about prevalence and incidence.  Incidence is new cases of a disease.…

Q: Explain why some pathogens evolve greater levels of virulence under the Trade-off hypothesis. What…

A: According to the trade-off theory, the cost to the pathogen of utilising the host's resources for…

Q: if a particular disease occurs in humans in occasional, isolated, sporadic cases, but most of the…

A: Sporadic diseases are those that occur infrequently or irregularly in a few isolated places.

Q: Lice are small wingless insects that make their home in human hair and feed on very small amounts of…

A: Communicable diseases include HIV , hepatitis , measles , snd blood borne diseases.  Non…

Q: Which of the following statements is correct? a. Serial interval is the length of time a…

A: Illnesses that are caused by harmful pathogenic organisms or agents that are present outside the…

Q: When an arthropod bites and injects a pathogen into the new host, this route of infection is…

A: Pathogens are the microbes that cause disease in its host.

Q: Pregnant women are often cautioned against cleaning cat litter boxes. This is because Toxoplasma, an…

A: Any infectious agent or microorganism (Virus, bacterium, protozoa, ETC) that can cause disease is a…

Q: Which of the following statements is true? Multiple Choice Malaria produces minimal changes in…

A: Protozoa is a diverse group of unicellular eukaryotic organisms that can cause a variety of diseases…

Q: Diseases that primarily exist in animals, but may be transmitted to humans are called parasitic…

A: Definition:Diseases that primarily exist in animals, but may be transmitted to humans are called as…

Q: An 83 year old patient has been ill the past couple of days with an upper respiratory infection. Her…

A: Nursing counselling and advise involves certain intervention which helps process focusing on the…

Q: Which of the following applies to Malaria? Choose all that apply. Group of answer choices It is a…

A: Disease is any state of any physiological deviation from being normal. Disease can be infectious or…

Terrestrial Ecosystem

An ecosystem is a collection of interconnected communities. It includes both living and non-living elements of specific strata. The terrestrial ecosystem is solely related to the ecosystem present on the land and covers 25 to 30% of the total earth’s surface area.