ENTOM 102 Exam 4 Study Guide
ENTOM 102 Exam 4 Study Guide 8404
Popular in ENTOM 102
verified elite notetaker
Popular in Biology
This 6 page Study Guide was uploaded by Irene A. on Friday April 17, 2015. The Study Guide belongs to 8404 at Washington State University taught by Dr. Owen in Winter2015. Since its upload, it has received 188 views. For similar materials see ENTOM 102 in Biology at Washington State University.
Reviews for ENTOM 102 Exam 4 Study Guide
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 04/17/15
ENTOM 102 Exam 4 Study Guide Exam Theme Topics 0 Sleeping Sickness 0 Chagas Disease 0 Filarial Nematodes 0 Host Preference 0 Host Finding 0 Odor 0 Behavior Mosquito Transmit worms 0 Dogs Heartworm o Humans Lymphatic infection 0 blood 0 water 0 warm weather 0 owers 0 transmission dog gt mosquito gt dog or human gt mosquito gt human 0 heartworm found in southern US 0 sleeping mosquitoes feed at night Kissing Bug Transmit 0 Central amp South America 0 Human environment cracks in walls thatched roofs provide habitat 0 feed on blood 0 pick up disease pathogen from many animals especially livestock amp dogs 0 pooping while blood feeding gt Chagas transmission pathogen enters wound or is rubbed in mouth or eye 0 parasite destroys nerves controlling intestines amp esophagus heart damage 0 uses odor to locate hosts 0 senses heat 0 Economics 0 infrastructure of housing 0 pest control 0 healthcare costs 0 Behavior 0 no Chagas transmission in US 0 kissing bugs in US don39t poop while feeding Tsetse Fly Transmit 0 Found in SubSaharan Africa split into East amp West 0 East disease works fairly quickly kills within weeks 0 West disease works slowly kills in months or years 0 infects nervous system 0 transmission human gt y gt human or animal gt y gt human 0 Reproduction female y carries live larvae amp deposits it in sand 0 feed during the day 0 use vision to find hosts respond to colors shapes amp movement 0 can be trapped using attractive shapes amp colors blue amp black 0 attracted to cars gt cars stopped at roadblocks gt ies netted amp killed 0 Historical 0 European colonization prevented horses amp cattle killed by animal equivalent of sleeping sickness o restricted development of animal agriculture in Africa most labor done by people 0 Drawn to shade blue light gt animals seek shade in heat Explain how a species39 behavior can in uence the location of disease transmission The kissing bugs39 behavior of expelling blood waste during feeding is what spreads Chagas disease kissing bugs in the US do not have this behavior and so Chagas is not transmitted in that particular area The Tsetse y39s behavior of gravitating towards certain preferences for color shape and movement will affect what sort of host it feeds on ex mobile hosts are more likely to be bitten than stationary ones Mosquitoes that transmit filarial nematodes generally do so at night and weather conditions can affect their ability to detect odor cues high wind speeds can accompany warm weather which can make it more difficult for mosquitoes to find hosts for feeding What economic factors interact with behavior to create opportunity for disease Economic restrictions lead people to build homes that create an ideal habitat for kissing bugs cracked walls and thatched roofs provide a place for the insects to live and most homes don39t have adequate barriers screens etc to keep them out Why are blood feeders attracted to carbon dioxide All vertebrates exhale carbon dioxide so the ability to detect it allows blood feeders a greater chance of finding a host for feeding How does insect preference for odors affect pathogen transmission Determining what populations are being bitten by insects allows for risk assessment and preventative measures such as trapping or deterrence How would you test an odor preference effect carbon dioxide in mosquitoes 0 Test with blood bag and human together in room with mosquitoes which do they prefer 0 Test preference between plants amp humans 0 Dead animal vs living animal 0 Flat soda vs fresh soda C02 0 Dry ice used to trap mosquitoes How has the tsetse y and sleeping sickness affected Europe s attempts at the colonization of Africa Tsetse ies that bite animals can transmit Nagana which is the animal version of sleeping sickness Before the industrial revolution all European attempts to colonize Africa relied on animals for transportation and sustenance These animals would contract Nagana and die thwarting any attempt to push farther into Africa What are the different ways insects navigate through the world 0 Insects can sense heat that guides them to their hosts 0 Insects can pick up odor cues for certain host preferences 0 Insects use visual cues to orient themselves and move around and to determine shapes colors and movement which are related to host preference Why are zebras striped Research has determined that black and white stripes are a color combination that is not attractive to Tsetse ies which prefer blue and black combinations Zebras may have evolved stripes as a way to deter the ies from biting and so avoid being infected by diseases like sleeping sickness How are tsetse ies so easy to control Tsetse ies can be easily trapped by exploiting certain color combinations and shapes that they find attractive Because tsetse ies only produce one offspring at a time trapping and killing a group of adults will have an immediate effect on the populations numbers compared to an insect like the mosquito where one adult can produce hundreds of offspring making population control much more difficult How does a kissing bug find its way back home at night Kissing bugs deposit waste in the cracks and holes where they hide during the day After they have tracked down a host and fed they find their way back by smelling for their own waste and following the scent trail A person has been bit by a kissing bug They have contracted Chagas disease Explain the likely scenario of howwhere this happened and what the end result will be After they were bitten on the face they either rubbed the insect s waste into the bite wound or touched the wound and then touched their eye transferring the pathogen in the waste The parasite will travel through the blood and eventually end up in the heart slowly destroying it the infected person will likely die of a heart attack if they are not treated Why does it take so long to show symptoms of Chagas disease and what are they Chagas symptoms begin with Roma a s sign which is indicated by intense swelling around the facial bite wound or eyes where the parasite entered the body After the swelling goes down there are not any other outward signs of illness as the parasite can infect the heart intestines or esophagus and damages them slowly it can take decades for the damage to become severe enough to be noticed Is it worthwhile to make a vaccine for Chagas disease in America No because the kissing bugs in America have behavioral differences compared to the insects in Central and South America American kissing bugs do not poop while blood feeding and so Chagas disease cannot be transmitted to humans in any significant numbers A vaccine would not be profitable enough to be worth making since nobody would actually need it How do our eyes perceive the world vs how an insect perceives the world Compared to insects humans perceive a relatively narrow spectrum of light and rely almost entirely on visual cues to get around Insects are able to utilize a broader range of sensory input and can get around based on cues from smell heat colors etc How do tsetse ies locate a host and how does it differ from how we see things Tsetse ies have preferences for certain color combinations blue and black and shapes and also prefer moving targets Humans see things in greater detail and are capable of making sense of complex shapes while the ies tend to have a preference for boxy shapes Describe the similarities and differences of an insect in the air and a person in the ocean Both a human and insect require multiple sources of information in order to orient themselves when surrounded by the medium of either air or water Two sources of visual information would be needed in the ocean ex clouds and shoreline as a point of comparison to determine movement direction A mosquito in the air would need visual ground cues combined with scent trails to determine how it39s moving Is our perception of the world really accurate Explain No because the brain processes information in a way to navigate the world efficiently using too many sources of information would require too much energy We perceive what we need in order to get around and the rest is ignored Give two reasons why it is beneficial for a mosquito to bite at night Mosquitoes that prefer to feed on humans will have an easier time because humans are less active at night and less likely to notice and kill the mosquitoes Feeding at night also allows them to avoid daytime predators like birds What is easier to control mosquitoes or kissing bugs What steps would you take to control them And what would the results look like Kissing bugs can be controlled by providing better building and maintenance methods for cheap housing and transmission of Chagas disease can be lowered by encouraging certain hygienic practices such as frequent face washing and disinfecting not touching eyes etc Why does an insect need multiple receptors in order to survive and find food Can they only have one receptor and survive An insect with only one receptor probably wouldn39t survive because multiple sources of information allow an insect to make comparisons between the two to determine its location For example a mosquito with no eyes would not be able to get around because they need to use Visual cues on the ground in order to properly find and follow scent cues
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'