(M) Eimeriina (Coccidia) Flashcards
(module and laboratory discussion-based
This group consists of members, which are obligate intracellular parasites and do not have definite organelles of locomotion.
Species of Eimeriina (coccidia)
Phylum, class, subclass and superorder
Apicomplexa
Sporozea
Coccidia
Eucoccidea
Order, Suborder, family
Eucoccidiida
Eimerrina
Eimerridae
Life cycle consists of 2 phases
Schizogony (asexual cycle) and sporogony (sexual phase)
Movement
body flexion, gliding, or undulation of longitudinal ridges
These two processes can occur in the same host such as in
man, by definition, is both intermediate and definitive host
Cystoisospora belli
In schizogony, the organism multiplies through segmentation or division, wherein nuclear division is followed by that of the cytoplasm, resulting to organisms with its own nucleus called the?
merozoites
Sporogony, on the other hand, involves union of sex cells that results to the formation of?
sporozoites
(3) have only a single direct cycle of transmission whereby both asexual and sexual stages of multiplication occur in a single host
cystoisospora, eimeria and cryptosporidium
(2), sexual stages are usually in the intestinal mucosa of a carnivorous host (predator) resulting in an oocyst or sporocyst that passes out in the feces to infect an intermediate host (the prey) where asexual multiplication will occur.
Sarcocystis and Toxoplasma
The smallest and earliest stage within a tissue cell is the?
trophozoite
the ones that invade other tissue cells to become young trophozoites again
merozoites
Mature sex cells, called gametes (macrogamete for female and microgamete for male), unite to form
zygote
The zygote secretes a cyst wall and becomes a/an
oocyst, with a sporoblast inside
Sporoblast secretes a cyst wall to form
sporocyst
contains sporozoites
sporocyst that contains sporozoites, which, therefore, is called
mature oocyst
Rupture of cyst wall causes release of?
sporozoites
The schizont grows and later causes rupture of the host cell to release the?
merozoites
Cystoisospora belli formerly known as
Isospora belli
Cystoisospora belli is a causative parasite of
human coccidiasis or cystoisosporiasis
- worldwide distribution, although rare, it is more common in tropical than temperate region
- Both the sexual and asexual process occurs in man
CYSTOISOSPORA BELLI
CYSTOISOSPORA BELLI
Inhabit
distal duodenum and proximal ileum
CYSTOISOSPORA BELLI: Life Cycle
Man acquires the infection through?
ingestion of contaminated food and drinks
CYSTOISOSPORA BELLI: Life Cycle
At what stage can this be ingested?
mature oocyst
CYSTOISOSPORA BELLI: OOCYST
Shape
“neck-like” appearance
complete: elongate ovoid, one end is narrowed as compared to the other
that results to a “neck-like” appearance
CYSTOISOSPORA BELLI: OOCYST
how many layers does the cyst wall contain?
two-layered, colorless, and smooth
CYSTOISOSPORA BELLI: OOCYST
Immature cyst has how many sporoblast within?
1-2
CYSTOISOSPORA BELLI: OOCYST
Mature cyst:
2 sporocyst
CYSTOISOSPORA BELLI: OOCYST
how many sporozoites in each sporocysts?
4 shaped like a banana
CYSTOISOSPORA BELLI
pls study the pathogenesis
Infection is confined to the intestinal epithelial cells, and cause destruction of the surface layer of the intestine. There is malabsorption, markedly abnormal intestinal mucosa with short villi, hypertrophied crypts, and infiltration of the lamina propia with eosinophils, neutrophils, and round cells.
The infection is oftentimes asymptomatic and self-limiting. Some may manifest with mild gastrointestinal distress to severe dysentery producing pale yellow and foul-smelling stools that may suggest malabsorption process. Chronic diarrhea, weight loss, weakness, malaise, and anorexia may occur.
CYSTOISOSPORA BELLI
Lab diagnosis
- fecal smears
- concentration procedures (zinc sulfate)
- enterotest (for oocyst)
CYSTOISOSPORA BELLI
Treatment
trimethoprim – sulfamethoxazole or Co-trimoxazole
caused by a microscopic parasite Sarcocystis
HUMAN SARCOCYSTIS INFECTION
HUMAN SARCOCYSTIS INFECTION
One causes intestinal sarcocystis infection, manifesting as?
diarrhea, fever (mild) and vomiting
HUMAN SARCOCYSTIS INFECTION
etiologic agent
Sarcocystis hominis/ suihominis
HUMAN SARCOCYSTIS INFECTION
Sarcocystis hominis/ suihominis produces a/an?
oocyst
HUMAN SARCOCYSTIS INFECTION: Sarcocystis hominis/ suihominis
intermediate hosts
cattles and pigs
HUMAN SARCOCYSTIS INFECTION: Sarcocystis hominis/ suihominis
definitive host
man
HUMAN SARCOCYSTIS INFECTION
This other type presents with muscle pains, transitory edema, and fever
extra-intestinal sarcocystis infection
extra-intestinal sarcocystis infection is caused by what disease?
Sarcocystis lindemanni
Sarcocystis lindemanni produces?
sarcocyst
Sarcocystis lindemanni
Intermediate host
Man
Sarcocystis lindemanni
Definitive host
UKNOWN P RAW
SARCOCYSTIS HOMINIS/ SUIHOMINIS
paaral ng life cycle mwah
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