To review:
A flagellated organism surviving in water, when its cyst is ingested, and the trophozoite grows in the intestine and cause diarrhea.
Introduction:
Microorganisms that have the ability to cause infectious diseases are called as pathogens. Such microorganisms include bacteria,
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Microbiology: An Introduction (13th Edition)
- Each of the following statements concerning Entamoeba gingivalis is correct EXCEPT O Normal habitat large intestine O Trophozoite is diagnostic, infective, and pathogenic stage ODirectly transmitted from person to person. O Is an opportunistic protozoa.arrow_forwardAspergillus fumigatus may cause pulmonary mold infections in immunocompromised patients. Which of the following structures causes the tissue destruction in the patients: tissue destruction by enterotoxins tissue destruction by pseudohyphae none of the above apply tissue destruction by cysts tissue destruction by plaque formation tissue destruction by aerial hyphae tissue destruction by vegetative hyphaearrow_forwardCharacteristics of Dientamoeba fragilis include all of the following except: a. This organism is a flagellate with internal flagella b. Transmission is thought to occur through the ingestion of specific helminth eggs c. This organism is pathogenic and tends to be more commonly found in children d. Trophozoites contain a single nucleus, while the cysts contain two nucleiarrow_forward
- 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 responsearrow_forwardDraw a labeled diagram of structure of spore of Riccia.arrow_forwardTrichomonas vaginalis may exhibit multiple flagella. True Falsearrow_forward
- Why can superficial mycoses in humans lead to bacterial infections?arrow_forwardTrichomonas vaginalis is a Protozoa transmitted via sexual intercourse by what type of infective stage? Cyst Trophozoite Cyst and Trophozoite Eggs Question 26 To exterminate the disease African Trypanosomiasis caused by the Protozoan Trypanosoma brucei spp. which intermediate host should be eliminated? Cattle Pig Anopheles mosquito Glossina flyarrow_forwardAll of the following are protozoan diseases of the gastrointestinal tract, acquired by ingesting cysts EXCEPT: Cryptosporidiosis Amoebic dysentery Giardiasis Trichomoniasis None of the other four answers (All are protozoan Gl diseases acquired by ingesting cysts)arrow_forward
- Peroxisomes are not included in the population of vesicularorganelles because of their specialized function and uniquebiogenesis. Describe the function of this organelle andexplain how it is formed.arrow_forwardIn the mosquito, Malaria goes to the salivary glands as during the infectious stage and then enter the liver cells of the host. Plasmodium Spores Merozoites O Sporozoitesarrow_forwardWhy is Entamoeba histolyticaoften termed as “clinically significant amoebic parasite”? Differentiate the Entamoeba histolyticaand Entamoeba coliin the appearance of their cysts and trophozoites seen under microscope. What parasite is commonly mistaken as Entamoeba histolytica and why?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College