Parasitology1

Amoebae can be found worldwide. The motile, reproducing and feeding stage is called a ______; most commonly lives in lower gastrointestinal tract.

Many amoebae also form a non-feeding nonmotile stage called a __; this is the stage that is infective for man.

Transmission of cysts typically occurs through _____.

After ingestion of cysts it pass to the lower intestine and excyst and multiply as feeding ______.

To help identify cysts of amoeba, _______ stains are especially helpful since they allow us to magnify the parasite more and  and so we can better see the nucleus and other intracellular structures.

Trophozoites most commonly lives in the ______________ ______ ______.

Infection with this amoeba can be transmitted sexually by gay men causing a disease known as "gay bowel syndrome"

Entamoeba dispar is ______.

A nonpathogenic species that causes the most confusion with Entamoeba Histolytica is ____________.

The cysts and trophozoites between Entamoeba Histolytica and Entamoeba dispar are identical except that _________ ____ is non-invasive and never ingests RBCs.

Some labs will use this phrase when reporting amoeba that resemble E. histolytica, "E. histolytica / E. dispar" when no _____ are seen; this leave treatment up to the physician based on the symptoms shown by the patient.

Trophozoites of Entamoeba Histolytica are  ____- ______ um in size.

The cytoplasm of the trophozoite may contain ingested ______ when it is invasive in tissue

Entamoeba Histolytica invades the intestinal wall and  multiplies in the ______ tissue.

_____ are not seen in the trophozoites of any other amoeba except Entamoeba Histolytica.

The trophozoites move by means of ________ and exhibits active, progressive motility in a saline wet mount.

The cysts of Entamoeba Histolytica contain ______ nuclei; more nuclei are seen as the cyst matures.

Entamoeba Histolytica cysts are also _____ - ______ um in size and are round.

The cysts in Entamoeba Histolytica may contain  _____ shaped structures known as  chromatoid bars.

Cyst formation for Entamoeba Histolytica occurs only within the ____ _____; once the stool has left the body, cyst formation does not occur.

After ingestion of a Entamoeba Histolytica cyst; no changes occur in an acidic environment such as in the stomach; once the pH becomes neutral or slightly alkaline, the encysted organism becomes active (excysts) and four separate ________ are formed and establish residence in the large intestine.

Stool must be received while it is till warm for you to see motile Entamoeba Histolytica ________.

The most important permanent stain for Entamoeba Histolytica is _________.

A minimum of ____ specimens collected over a time frame of 10 days is recommended for diagnosis of Entamoeba Histolytica.

Immunoassays using _______ antibodies are available for detecting the Entamoeba Histolytica parasite in stool samples.