Which of the following is NOT true about malaria? Malaria is one of the leading causes of infectious disease deaths worldwide Caused by the protozoan Plasmodium Transmitted to humans by the Anopheles mosquito Through all stages of its life cycle (in both host and vector), the causative microbe exists in only one form, called a sporozoite Malaria can sometimes cause lifelong recurrent disease
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- Malaria is caused by four species of Plasmodium. There are two distinct stages of a malarial infection, an asexual cycle and a sexual cycle. Summarize the key stages in the development and transmission of a malarial infection.Which of the following is not a mosquito borne disease? A. Dengue feverB. MalariaC. Sleeping sicknessD. FilariasisThere's a link between evolution of sickle cell trait and malaria. Comment.
- The malarial form infectious for mosquitoes is called aa) gametocyte. b) trophozoite. c) sporozoite.d) schizont. e) merozoite.Which of the following statements is true? Multiple Choice Malaria produces minimal changes in tissue function. The Plasmodium falciparum species of Plasmodia does not infect humans. Protozoal infections readily respond to drug therapy. Americans are not exposed to protozoal infections.One of the most characteristic symptoms of malaria is the alternation of attacks (involving a cold phase, a hot phase, and a sweating phase) with periods of 1 or 2 days of no or few fevers. Given the life cycle of Plasmodium what is the best explanation for this pattern: When free in the blood, merozoites release chemicals that directly cause body responses. Merozoites appear in coordinated “waves”, which explains the cycling attacks Merozoites entering the red blood cells generate a strong response from the red blood cells, which stimulates a massive immune response Attack phase correlates with simultaneous bursting of infected red blood cells, releasing thousands or millions of merozoites. This triggers massive immune response, resulting in symptoms Plasmodium generates a constant accumulation of irritants in the blood, mostly residues from digesting hemoglobin . Once the amount reaches a critical level, these trigger a massive immune response
- Which are true about tick-borne bacterial diseases? Select which true O One example is the West Nile Virus One example is Lyme disease O The tick is considered a vector O The tick gets sick when infected with Borrelia burgdorferi O One example is Rocky Mountain Spotted Fever One example is Hantavirus Pulmonary Syndrome One example is Chikungunya O Some tick-borne diseases can cause severe illness in humansOn the other hand,a patient who passes of mucoid-stool is suspected of; a.cholera b typhoid fever c shigellosis d amoebasis Which among the following diseases has the incubation period of 7hours to 7 days? a.shigellosis b cholera c. amoebiasis d.typhoid fever The main vector of genus Leptospira is; a rat b rabbit c pig d chickenEven though genetically engineered mosquitoes might be developed that do not allow the reproduction of malaria protozoa, these mosquitoes would have little, if any, immediate effect on the spread of the disease. Why should this be so? What would have to happen for these mosquitoes to significantly affect the spread of malaria?
- Seasonality of a disease can relate to weather patterns rather than seasons. Malaria is a prime example and has a seasonality related to water and the wet season vs. the dry season. Explain why considering the vector.What do the following viral encephalitis diseases have incommon: eastern equine encephalitis, western equine encepha-litis, Venezuelan equine encephalitis, St. Louis encephalitis, WestNile fever?(a) They are all caused by the same virus.(b) They all have the horse as a common intermediatehost.(c) They are all transmitted into the body through the biteof an infected mosquito.(d) Birds are never involved in the life cycle of the virusesthat cause these diseases.(e) Both a and d.No explanation needed, letter of the answer only. 34. All are aphasmids except: a. Trichuris b. Trichinella c. Trypanosoma d. Capillaria e. NOTA 35. Which of the malaria paeasire/s have continuous reproduction in the liver? a. P. falciparum b. P. vivax c. P. ovale d. P. malariae e. b and c 36. Which is not a mode of transmission for Toxoplasma a. ingestion of oocyst in raw pork b. inhalation of oocyst from cat feces c. vertical transmission d. bite or scratch of a cat e. c and d