L23 - CONDENSED Flashcards
Which of the following has a trophozoite form that, while NOT infective, IS found in the colon and invades by eating RBC’s and releasing proteases?
A. G. lamblia
B. T. vaginalis
C. E. histolytica
D. N. fowleri
C. E. histolytica
Which form of E. histolytica allows for transmission/infection of new host and forms with feces formation?
A. Cyst form
B. Trophozoite form
A. Cyst form
Which flagellate is the most common cause of waterborn diarrhea outbreaks + humans are the man reservoir?
A. T. vaginalis
B. G. lamblia
B. G. lamblia
True or False: The cyst form of E. histolytica and G. lamblia are the forms responsible for transmission
True
Which flagellate has a cyst form that is formed as trophs dehydrate?
A. T. vaginalis
B. G. lamblia
B. G. lamblia
Which flagellate has x4 flagella, an adhesion disc, and have villi that display a Lawnmower Effect?
A. E. histolytica
B. C. parvum
C. G. lamblia
C. G. lamblia
Which of the following is associated with brain necrosis and a trophozite form that becomes flagellated under adverse conditions?
A. T. vaginalis
B. N. fowleri
C. C. parvum
D. E. histolytica
B. N. fowleri
True or False: C. parvum has a cyst form that is environmentally resistane and a trophozoite form that becomes flagellated under adverse conditions
False - this is the case with N. fowleri
Promitosis (replication via bin fission, with nuclear membrane remaining in tact) is seen in….
N. fowleri
Keratitis can be seen with ______
A. T. vaginalis
B. Acanthamoeba
C. N. folwleri
B. Acanthamoeba
True or False: T. vaginalis is the one protozoan known to be transmitted via sexual contact
True
True or False: Patients with E. histolytica and G. lamblia can be asymptomatic
True
Dysentery, Abscess of Liver/Brain/ALA, and Ameboma are seen with infection by….
A. E. histolytica
B. C. parvum
C. T. vaginalis
A. E. histolytica
Epithelial erosion and interference with fat/protein absorption are seen with infection by….
G. lamblia
How does G. lamblia attach to microvilli?
Sucking disks
Which microbe causes malaria and toxoplasmosis?
C. parvum
Sporozoite are release from oocyte, attach to microvilli, and become meronts with infection by which microbe?
C. parvum
Acid-Fast staining or H&E is best for examining which microbe?
C. parvum
True or False: C. parvum is an obligate intracellular parasite
True
Which stage of the N. fowleri life cycle is the infective one?
A. Cyst
B. Ameboid Trophozoite C. Flagellated
B. Ameboid Trophozoite
True or False: T. vaginalis prefers an acidic environment
False - basic
True or False: G. lamblia does invade
False - it does NOT
A patient has Statorrhea (excess fat in stool) that you identify via: Direct Fecal Sudan Stain. Which microbe likely infected them?
G. lamblia
C. parvum has sporozoite that become meronts. Following this, they parasitize the ____ and ___
GI; respiratory tract
Once C. parvum is inside epithelial cell, it goes through sporogony ( ) and merogony ( )
sporogonoy = sexual
mergony = asexual
In C. parvum, oocysts are a result of sexual reproduction. In ____ walled oocysts, there is ____. In ____ walled oocysts, oocysts shed in stool.
Autoinfect
- thin walled
Oocysts shed in stool
- thick walled
E. histolytica is transmitted via ___ contamination of food and water, whereas G. lamblia is food borne, and C. parvum is person-person, domestic animals, or fecal-oral
fecal
