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Class  Mastigophora (  Flagellata Class  Mastigophora (  Flagellata

Class Mastigophora ( Flagellata - PowerPoint Presentation

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Class Mastigophora ( Flagellata - PPT Presentation

ALLamieaa Gh Fajir General characteristics 1 Motility is by flagella The flagellum arises from kinetoplast The kinetoplast is composed of the blepharoplast and the ID: 780287

length trichomonas body flagella trichomonas length flagella body flagellates giardia intestine trophozoite cyst large membrane extend anterior lamblia chilomastix

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Slide1

Class Mastigophora( Flagellata)

A.L.Lamieaa

Gh

. Fajir

Slide2

General characteristics:1) Motility is by

flagella

. The flagellum arises from

kinetoplast

.

The

kinetoplast

is composed of the

blepharoplast

and the

parabasal

body.

2) Vesicular

nucleus

with central

karyosome

.

3) Reproduction is by longitudinal

binary fission.

4) Complex

life cycles

include alternation of hosts.

Intermediate hosts

commonly serve as

vectors,

which transport developing parasites from one

definitive host

to another.

Slide3

Classification: The flagellates protozoa that are parasites of human including:

1-Flagellates of digestive tract and genital organs such as

:

Flagellates of digestive tract

:

-Giardia

lamblia

,

-

Chilomastix

mesnili

,

-

Trichomonas

hominis

.

-

Trichomonas

tenax

.

Flagellates of genital organs

:

-

Trichomonas

vaginalis

.

2- Flagellates of blood and tissue:

-

Leishmania

sp.

-

Trypanosoma

sp.

Slide4

Giardia lamblia

Giardia

lamblia

is a flagellated protozoan parasite that

colonises

and reproduces in the

small intestine

, causing

giardiasis

(

lambliasis

).

Trophozoite

:

Giardia

trophozoites

are

pear-shaped or balloon shape

and measure

10-20 µm

in length. In permanent, stained specimens,

2 large nuclei

are usually visible. The

sucking disks

(

used for attaching to the host’s mucosal epithelium

)

,

median bodies

, and

flagella (8)

may also be seen

Slide5

Slide6

Cyst

Slide7

habitat: the small intestine (duodenum) and gall-bladder.

Diagnosis

: the diagnosis is based in recovery of typical cyst and less frequently the

trophozoite

in the stool.

 

Transmission:

faecal-oral (alimentary).

Infective stage

:

cyst.

Slide8

Chilomastix mesnili

Chilomastix

mesnili

is a

nonpathogenic

intestinal

commensal

of humans.

This parasite is found in the

large intestine( colon

).

 

Trophozoite

:

8- 15μm length

broadly wide anterior

a sharply pointed posterior end

one large nucleus

three free flagella, two short and one long

mouth opening ---

cytosome

two stiff internal flagella embedded in the

cytosome

Slide9

Slide10

Cyst:7- 10 μm

length

lemon shaped

one nucleus

thickening in the anterior part ( knob).

Slide11

Trichomonas

. hominis

Trichomonas

tenax

Trichomonas

vaginalis

Habitat

Large intestine

mouth

Vagina and urethra

Size (length)

5-15

μm

5-12

μm

7-23

μm

Number Anterior flagella

Usually 5

(3-4)

(4-5)

Usually 4

(3-5)

Posterior flagella

Extend on the free margin of undulating membrane

Extend posteriorly beside the costa

Extend

posteriorly

beside the

costa

cytosome

Wide

Narrow(small)

slit-like

Undulating membrane

Full body length with free trailing flagellum

2/3 of the body length

½ of the body length

Cytoplasmic metachromatic granules

Fine & scattered

Fine & scattered

Coarse, aggregated around the undulating membrane &

costa

Para basal body

lacking

Faintly stained

Well-developed

pathogenisity

----

commensal

Pathogenic (

Trichomoniais

)

Slide12

Trichomonas vaginalis trophozoite

Slide13

Trichomonas hominis tropozoite

Slide14

Trichomonas tenax tropozoite