18 Questions
What is the most common clinical manifestation of B coli infection?
Chronic recurrent diarrhea
Describe the pathology when B coli trophozoites invade the mucosa and submucosa of the large bowel and terminal ileum.
Abscesses and irregular ulcerations are formed.
What are the possible symptoms of B coli infection other than chronic diarrhea?
Bloody mucoid stools, tenesmus, and colic
How can B coli infection be diagnosed in a laboratory setting?
Detection of trophozoites in liquid stools or cysts in formed stools.
What treatment approach may be followed for B coli infection?
A course of oxytetracycline, followed by iodoquinol or metronidazole if necessary.
Where is B coli commonly found?
In humans throughout the world, particularly in the tropics.
What are the common symptoms of acute amebiasis?
Dysentery (bloody, mucus-containing diarrhea), lower abdominal discomfort, flatulence, tenesmus
Describe the clinical manifestations of chronic amebiasis.
Diarrhea, weight loss, fatigue
How does amebic abscess of the liver typically present?
Right-upper-quadrant pain, weight loss, fever, tender, enlarged liver
What is an ameboma and where can it be found?
A granulomatous lesion that may form in the cecal or rectosigmoid areas of the colon
How can E. histolytica trophozoites be distinguished?
By the nature of the nucleus (small central nucleolus, fine chromatin granules along the border)
What are the recommended methods for examining for cysts in intestinal amebiasis?
Wet mount in saline, iodine-stained wet mount, fixed trichrome-stained preparation
What are the clinical findings of giardiasis?
Watery (nonbloody), foul-smelling diarrhea accompanied by nausea, anorexia, flatulence, and abdominal cramps persisting for weeks or months.
How is giardiasis diagnosed in the laboratory?
Microscopic examination finding trophozoites or cysts in diarrheal stools. In asymptomatic carriers, only cysts are seen. Serological test ELISA can also be used to detect Giardia cyst wall antigen in the stool.
What is the treatment of choice for giardiasis?
Metronidazole (Flagyl) or quinacrine hydrochloride.
How is Balantidium coli transmitted?
Transmission occurs by ingestion of mature cysts.
What is the morphology of the trophozoite of Chilomastix mesnili?
It has 4 flagella (3 anterior, 1 associated with the cytostome) and one nucleus, always located anteriorly.
What are the clinical manifestations of Balantidium coli infection?
Balantidium coli causes balantidiasis or balantidial dysentery.
Learn about the symptoms and complications of amebiasis, including dysentery, lower abdominal discomfort, diarrhea, weight loss, fatigue, and the formation of amebomas in the colon. Discover how carriers can transmit the infection to others.
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