INTESTINAL PARASITES (Helminths)
NEMATODA Order: Trichurata

TRICHURIS TRICHIURA

tt1-ic

Trichuris trichiura: world-wide distribution;
it is the third most common worm of man.
Life cycle.

tt1a-ic

Trichuris trichiura  adults in gut (preserved post mortem specimen)


 

trichuris_colon-ic

Trichuris trichiura: adults in colonic mucosa observed during colonoscopy.
 

344Saygi-ic

Trichuris trichiura: a macroscopic view 
of a tangled mass of adults (male and female) in pure glycerine. 
The adult female measures about 35-50 mm in length, 
and the male about 30-45 mm.

345Saygi-ic

Trichuris trichiura: anterior end of an adult. 
(10 x, mounted in glycerine jelly)

349Saygi-ic

Trichuris trichiura: oesophageal region of an adult. 
Observe the bacillary band (arrow), the nuclei, and the stichocytes. 
(10 X)

350Saygi-ic

Trichuris trichiura: the cuticle of the worm at the side of bacillary band. 
(10 x, mounted in glycerine jelly)

351Saygi-ic

Trichuris trichiura: higher magnification of the figure 350 (20 X)

352Saygi-ic

Trichuris trichiura: oesophageal region of the worm. 
Observe the bacillary band, the stichosome and the nucleus of a cell. 
(20 X in glycerine jelly)

371Saygi-ic

Trichuris trichiura: vulvar region. 
(10 X in glycerine jelly)

372Saygi-ic

Trichuris trichiura: higher magnification of the figure 371 (20 X)

tt2-ic	Lykourgos trichuris-ic

Trichuris trichiura: typical T.trichiura eggs; egg measures 50-55 by 22-24- µm
and has a brown, smooth shell, with bipolar prominences (plugs)
and contains a single-cell ovum.

tt3-ic

Trichuris trichiura: detail of bipolar prominences.

tt4mx-ic

Trichuris trichiura: Trichuris four cells.-

tt5mx-ic

Trichuris infective.- Trichuris spp. infective egg, 
was incubated for a period of four weeks at 26 şC in a solution 
of 0.1 N sulfuric acid,obtaining the development to a stage 2 larva (L2).

Trichiuria1-ic

Trichuris trichiura: adulte female recovered from the ascendent colon of a 66 year-old
female with tubular adenomata. The female is 35-50 mm long. The adult body is distinct in two region: and anterior slender portion (100-150 micron in diameter) and a posterior thick portion (400-700 micron).

TrichiuriaHE_1.25x	TrichiuriaHE_4x	TrichiuriaHE_4x2	TrichiuriaHE_10x_1

Trichuris trichiura: longitudinal section of adult female; HE stain; 1,25 to 40 X magnification.
The adult of T.trichiura has two distinct body regions: the slender anterior portion contains large glandular cells (stichocytes) encolosing the esophagus and the bacillary band (a subcuticular structure composed of tall columnar cells) (TrichiuriaHE_4x); the posterior portion contains the intestine and the reproductive organs. The cuticle  is 5-10 micron thick and is transversely striated; the hypodermis is 1-3 micron thick; lateral cords are usually absent. Somatic muscles, present at all levels of the worm, are numerous, small, forming band below the hypodermis (TrichiuriaHE_10x_1; TrichiuriaHE_10x_2; TrichiuriaHE_20x_1). The intestine is large and contains columnar cells with microvilli. The single reproductive tube is in the posterior portion of the worm and consists of a vulva, vagina, uterus, seminal receptacle, oviduct and ovary (TrichiuriaHE_4x2; TrichiuriaHE_10x_1; TrichiuriaHE_10x_2; TrichiuriaHE_20x_1). Eggs are barrel-shaped, measuring about 50 X 22 microns (TrichiuriaHE_20x_1; TrichiuriaHE_40x_1).