Microbiology Lab final study guide
Study online at https://quizlet.com/_jt0zbi
1. Type: Liver fluke (Fasiola hepatica)
Identification: Large, leaf-shaped worm with suckers
for attachment
Transmission: Eating aquatic plants (ex: watercress)
contaminated with larval forms
Disease: Fascioliasis (infection of liver and bile ducts)
2. Schistosoma Japocium Female (blood flukes)
Type: Trematode (fluke)
Identification:
Longer and thinner than male
Cylindrical appearance
Resides in the male's gynecophoral canal during mat-
ing
Produces eggs that contribute to disease pathology
Causes schistosomiasis
Transmission: Cercariae penetrate skin during contact
with contaminated freshwater
Disease: Schistosomiasis
3. Schistosoma Japocium Male (blood flukes)
Type: Trematode (fluke)
Identification:
Shorter and thicker than female
Has a gynecophoral canal (groove) that holds the fe-
male during mating
Lives in blood vessels
Causes schistosomiasis
Transmission: cercariae penetrate skin from contami-
, Microbiology Lab final study guide
Study online at https://quizlet.com/_jt0zbi
nated freshwater
Disease: Schistosomiasis
4. Giardia lamblia cysts
Stage: Infectious, resistant form
Shape: Oval/elliptical cyst
Identification features:
Mature cyst has 4 nuclei
May contain internal structures (axonemes/flagellar
remnants)
Thick protective cyst wall
Transmission: Fecal-oral route through contaminated
food or water
Disease: Giardiasis
Diagnosis: Detection of cysts or trophozoites in stool
samples
5. Giardia lamblia trophozoite
Stage: Active, motile feeding stage
Shape: Pear-shaped/teardrop-shaped
Identification features:
Two nuclei ’ characteristic "face-like" appearance
Multiple flagella for movement
Ventral sucking disk for attachment to intestinal wall
Movement: Tumbles or falls like a "falling leaf" motion
Disease: Giardiasis
Transmission: Fecal-oral route through contaminated
food or water
Diagnosis: Detection of trophozoites or cysts in stool
samples
, Microbiology Lab final study guide
Study online at https://quizlet.com/_jt0zbi
6. Male Enterobius vermicularis (Pinworm)
Smaller and shorter than female
Has a curved posterior (tail end)
Dies after mating
Type: Nematode (roundworm)
Transmission: Fecal-oral ingestion of eggs
Disease: Enterobiasis (pinworm infection)
Diagnosis: Tape test to collect eggs from the perianal
region
7. Female Enterobius vermicularis (pinworm)
Larger and longer than the male
Has a long, pointed posterior end
Migrates to the perianal area at night to lay eggs
Causes the characteristic nighttime anal itching
Type: Nematode (roundworm)
Transmission: Fecal-oral ingestion of eggs
Disease: Enterobiasis (pinworm infection)
Diagnosis: Tape test to collect eggs from the perianal
region
8. Female Necator americanus
Larger and longer than the male
Posterior end is pointed
Produces eggs that are passed in feces
Type: Nematode (roundworm)Disease: Hookworm in-
fection (ancylostomiasis)Transmission: Larvae pene-
trate human skin (often through bare feet) and mi-
grate through the body to the intestineIdentification:
Study online at https://quizlet.com/_jt0zbi
1. Type: Liver fluke (Fasiola hepatica)
Identification: Large, leaf-shaped worm with suckers
for attachment
Transmission: Eating aquatic plants (ex: watercress)
contaminated with larval forms
Disease: Fascioliasis (infection of liver and bile ducts)
2. Schistosoma Japocium Female (blood flukes)
Type: Trematode (fluke)
Identification:
Longer and thinner than male
Cylindrical appearance
Resides in the male's gynecophoral canal during mat-
ing
Produces eggs that contribute to disease pathology
Causes schistosomiasis
Transmission: Cercariae penetrate skin during contact
with contaminated freshwater
Disease: Schistosomiasis
3. Schistosoma Japocium Male (blood flukes)
Type: Trematode (fluke)
Identification:
Shorter and thicker than female
Has a gynecophoral canal (groove) that holds the fe-
male during mating
Lives in blood vessels
Causes schistosomiasis
Transmission: cercariae penetrate skin from contami-
, Microbiology Lab final study guide
Study online at https://quizlet.com/_jt0zbi
nated freshwater
Disease: Schistosomiasis
4. Giardia lamblia cysts
Stage: Infectious, resistant form
Shape: Oval/elliptical cyst
Identification features:
Mature cyst has 4 nuclei
May contain internal structures (axonemes/flagellar
remnants)
Thick protective cyst wall
Transmission: Fecal-oral route through contaminated
food or water
Disease: Giardiasis
Diagnosis: Detection of cysts or trophozoites in stool
samples
5. Giardia lamblia trophozoite
Stage: Active, motile feeding stage
Shape: Pear-shaped/teardrop-shaped
Identification features:
Two nuclei ’ characteristic "face-like" appearance
Multiple flagella for movement
Ventral sucking disk for attachment to intestinal wall
Movement: Tumbles or falls like a "falling leaf" motion
Disease: Giardiasis
Transmission: Fecal-oral route through contaminated
food or water
Diagnosis: Detection of trophozoites or cysts in stool
samples
, Microbiology Lab final study guide
Study online at https://quizlet.com/_jt0zbi
6. Male Enterobius vermicularis (Pinworm)
Smaller and shorter than female
Has a curved posterior (tail end)
Dies after mating
Type: Nematode (roundworm)
Transmission: Fecal-oral ingestion of eggs
Disease: Enterobiasis (pinworm infection)
Diagnosis: Tape test to collect eggs from the perianal
region
7. Female Enterobius vermicularis (pinworm)
Larger and longer than the male
Has a long, pointed posterior end
Migrates to the perianal area at night to lay eggs
Causes the characteristic nighttime anal itching
Type: Nematode (roundworm)
Transmission: Fecal-oral ingestion of eggs
Disease: Enterobiasis (pinworm infection)
Diagnosis: Tape test to collect eggs from the perianal
region
8. Female Necator americanus
Larger and longer than the male
Posterior end is pointed
Produces eggs that are passed in feces
Type: Nematode (roundworm)Disease: Hookworm in-
fection (ancylostomiasis)Transmission: Larvae pene-
trate human skin (often through bare feet) and mi-
grate through the body to the intestineIdentification:
