Microbiology Of Gis Flashcards
Acquiring gastroenteritis can be through….?
foodborne, waterborne, person-to- person,
zoonotic spread.
What is gastroenteritis
is inflammation of the lining of the stomach and small and large intestines.
Viral gastroenteritis are mainly transmitted through……?
Fecal-oral route
What is the diagnosis of norovirus?
Pcr
What is the type of epith in the small intestine?
Enterocytes which are columnar cells
The …….. increases the apical surface area in the small intestine and form striated border when looked at under light microscope
Microvilli
Enterocytes:
• Goblet cells, ….
• Paneth cells,…….
• Enteroendocrine cells,
• M cells (microfold cells),……..
whose primary function is absorption
unicellular mucin-secreting glands
whose primary function is to maintain mucosal innate immunity by secreting antimicrobial substances
which produce various paracrine and endocrine hormones
specialized cells located in the epithelium that covers lymphatic nodules in the lamina propria
the number of ……………increases from duodenum to ileum.
goblet cells
……… are most numerous in upper parts, their number slowly decreasing toward the lower end
of the tract
Enterocytes
What are the types of structures on the large intestine?
No villus
Has simple tubular glands
Crypts
Higher ratio of goblet cells to enterocytes
Microvilli
Epithelial stem cells
The ascending and descending segments of colon are covered posteriorly by adventitia so they are called?
Retroperitoneal
Which layer in the large intestine has large amounts of adipose tissue?
Submucosa
Which type of intestinal helminth inhabit the human gut, is doesn’t kill but impairs physical and mental growth of children,is a nematode(round worm)
Ascaris lumbricoides
What is the way of transmission of Ascaris lumbricoides?
Food eaten raw s.a vegetables, polluted water
Fecal-oral route
What is the most fatal clinical symptom of Ascaris lumbricoides?
Intestinal obstruction
What is the only nematode that can be coughed up?
Ascaris
Where does the larvae pf the ascaris lumbricoides mature?
In lungs
Which parasite causes anemia? And why?
Nector americanus and ancylostoma duodenale
Bcz they feed on blood
Which nematodes cause infection via skin penetration
Nector americanus and ancylostoma duodenale & (strongyloides)
Trichuris, ascaris, strongyloides, ancylostoma duodenale, and nectar americanus are which type of helminths?
Nematodes
What are two ex of cestodes?
Taenia saginata (beef tapeworm)
Taenia solium (pork tapeworm)
Lips of ascaris are ….
Denticulate
How many teeth does ancylostoma duodenale have?
4
How many teeth does necator americanus have?
2
Where does necator americanus and ancylostoma duodenale mature?
Small intestine
Which helminth is describes as being a “whip worm”, and looks like a barrel-shaped eggs or a lemon, causes severe infection (RECTAL PROLAPSE)
Trichuris
Which parasite can cause hyperinfection(overpopulation of parasite) , and impaired host immunity, and autoinfection?
Strongyloides
Which parasite causes bladder carcinoma ?
Schistosoma haematobium
What does the fasciola hepatica cause?
Hepatitis
Which type of parasite Cestode contains cysticerci (larval parasite)?
Taenia saginata (beef tapeworm)
The most important feature of …….. is the risk of development of cysticercosis?
Taenia solium taeniasis
What is the main symptom of taenia saginata (beef tapeworm)?
Passage (passive) of proglottids(reproductive part)
What is an imp feature of entamoeba histolytica (amoebiasis)?
Chocolate pus
And dysentery (blood in stool)
What is the clinical manifestations of entamoeba histolytica (amoebiasis)?
Flask shaped ulcers
Pin-point lesion
Which parasite causes ameobic colitis(dysentery) and non-dysenteric colitis and appendicitis( obstruction of appendic)?
entamoeba histolytica (amoebiasis)?
What is used to dectect cryptosporidium cyst in stool?
Acid fast stain
Cryptosporidium cyst is usually seen in which patients?
HIV & AIDS patients
What is the 2nd step of abdominal examination?
Auscultation
What is the transmission way of entamoeba histolytica (amoebiasis)?
Contaminated food and water
Which pathogen causes traveler’s diarrhea?
Enterotoxigenic strain
Which parasite causes traveler’s diarrhea?
Giardiasis
Which is the only symptom of giardiasis intestinalis?
Watery diarrhea
Which parasite is detected with acid fast stained stool?
Cryptosporidium cyst
the hydatid cyst is caused by ……..
infection of the larval stage of Echinococcus granulosis
