flagellates n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Flagellates PowerPoint Presentation
Download Presentation
Flagellates

Loading in 2 Seconds...

play fullscreen
1 / 50

Flagellates - PowerPoint PPT Presentation


  • 231 Views
  • Uploaded on

Flagellates. Old Taxonomy: PHYLUM SARCOMASTIGOPHORA SUBPHYLUM MASTIGOPHORA CLASS ZOOMASTIGOPHOREA New Taxonomy: Flagellates are placed in 5 PHYLA 2 groups of parasites:

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Flagellates' - kiril


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
flagellates
Flagellates
  • Old Taxonomy: PHYLUM SARCOMASTIGOPHORA SUBPHYLUM MASTIGOPHORA CLASS ZOOMASTIGOPHOREA
  • New Taxonomy: Flagellates are placed in 5 PHYLA
  • 2 groups of parasites:
    • intestinal and reproductive track flagellates (Chapter 6)
    • blood and tissue-dwelling flagellates (Chapter 5)
general flagellate anatomy
General Flagellate Anatomy
  • Pellicle- Combination of plasma membrane and thin, translucent, secreted envelope.
  • This gives the flagellate a more defined shape, they are stiff but still flexible, therefore they have a fixed shape.
general flagellate anatomy1
General Flagellate Anatomy
  • Flagella- used for locomotion; present/not; how long are they, how many present.
  • Flagella arise from granules and may be free (unattached) or attached.
general flagellate anatomy2
General Flagellate Anatomy

}

  • Basal granule
  • Blepharoplast Where flagella

arise from.

  • Kinetosome
general flagellate anatomy3
General Flagellate Anatomy
  • Undulating Membrane- Thin line of extending plasma membrane which flagellum attaches to before becoming a free flagellum.
general flagellate anatomy4
General Flagellate Anatomy
  • Axostyle- Tube like organelle, may or may not be present.
  • It arises from the kinetosome.
general flagellate anatomy5
General Flagellate Anatomy
  • Parabasal body- This is a Golgi Body located near the kinetosome, from which the parabasal filament runs to the kinetosome.

PB

PF

general flagellate anatomy6
General Flagellate Anatomy
  • Kinetoplast-A conspicuous part of a mitochondrion in some flagellates found near the kinetosome.
general flagellate anatomy7
General Flagellate Anatomy
  • Kinetoplast-A conspicuous part of a mitochondrion in some flagellates found near the kinetosome.
will look at intestinal and reproductive track flagellates
Will Look at Intestinal and Reproductive Track Flagellates
  • Trichomonas vaginalis (pathogenic)- occurs in reproductive and urinary system of people.
  • Trichomonas tenax- endocommensal in mouth (tooth sockets).
  • Pentatrichomonas hominis- endocommensal in large intestine and cecum.
will look at intestinal and reproductive track flagellates1
Will Look at Intestinal and Reproductive Track Flagellates
  • Chilomastix mesnili (endocommensal)- lives in the large intestine.
  • Giardia duodenalis (pathogenic)- small intestine.
general biology
General Biology
  • Absorption of organic material thru pellicle.
  • Some engage in pinocytosis.
  • T. tenax and T. vaginalis- Cytoplasm seem to be free of food vacuoles.
  • P. hominis- Have some food vacuoles in cytoplasm.
  • C. mesnili- Has an oral grove to sweep in food; has a cytostome.
merthiolate iodine formalin mif
Merthiolate-Iodine-Formalin (MIF)
  • Widely used technique.
  • Reagents that serve to fix cysts, trophs, and even helminth eggs and aid in identification of parasites.
intestinal and reproductive track flagellates of people
Intestinal and Reproductive Track Flagellates of People
  • Not very significant because they are not very pathogenic or life threatening.
trichomonas vaginalis
Trichomonas vaginalis
  • Phylum Parabasalia: With parabasal fibers originating at kinetosomes; axostyle non-motile; up to thousands of flagella.
trichomonas vaginalis1
Trichomonas vaginalis
  • Trophozoite is the only stage present in the life cycle.
  • They are 7-32µm long by 5-12µm wide.
trichomonas vaginalis2
Trichomonas vaginalis
  • It lives in the reproductive and urinary system of people.
trichomonas vaginalis3
Trichomonas vaginalis
  • It lives in the reproductive and urinary system of people.
  • More specifically it is found in the vagina and urethra of women, and in the prostate, seminal vesicles, and urethra of men.
trichomonas vaginalis4
Trichomonas vaginalis
  • It lives in the reproductive and urinary system of people.
  • More specifically it is found in the vagina and urethra of women, and in the prostate, seminal vesicles, and urethra of men.
  • It is more common in women, and hard to find in men because most are asymptomatic.
trichomonas vaginalis5
Trichomonas vaginalis
  • It is cosmopolitan in distribution, however prevalence is not uniform because of sanitary and hygiene habits (depends on surroundings).
    • 20-40% in Women
    • 15% in Men
trichomonas vaginalis6
Trichomonas vaginalis
  • It is pathogenic and causes Vaginitis.
trichomonas vaginalis7
Trichomonas vaginalis
  • It is pathogenic and causes Vaginitis.
trichomonas vaginalis8
Trichomonas vaginalis
  • It is pathogenic and causes Vaginitis.
  • Suffix means “inflamed” or “inflammation of “
  • So inflammation of the vagina.
trichomonas vaginalis9
Trichomonas vaginalis
  • Also can be called Trichomoniasis.
trichomonas vaginalis10
Trichomonas vaginalis
  • Also can be called Trichomoniasis
trichomonas vaginalis11
Trichomonas vaginalis
  • Also can be called Trichomoniasis.
  • Emphasis on a organism.
  • Etiological agent organism that causes something.

Remember the parasite is not a disease. The disease is the consequence of the parasites pathology.

symptoms
Symptoms
  • Usually none.
  • Particularly in males. They don’t show symptoms.
  • In females it ranges from: chaffing, itching, frothing/clear/creamy discharge that is profuse from vagina (leukorrhea).
pathology
Pathology
  • Eventually females get a disintegration of vaginal epithelial lining.
why is it pathogenic in females
Why is it Pathogenic in Females?
  • Natural flora (bacteria ) keep the pH of the vagina at 4-4.5 and ordinarily this discourages infections.
why is it pathogenic in females1
Why is it Pathogenic in Females?
  • Natural flora (bacteria ) keep the pH of the vagina at 4-4.5 and ordinarily this discourages infections.
  • T. vaginalis can survive at a low pH.
why is it pathogenic in females2
Why is it Pathogenic in Females?
  • Natural flora (bacteria ) keep the pH of the vagina at 4-4.5 and ordinarily this discourages infections.
  • T. vaginalis can survive at a low pH.
  • Once established it causes a shift toward alkalinity (pH 5-6) which further encourages its growth.
pathogenic
Pathogenic?
  • There is a tendency to explain stillbirths, spontaneous abortions, morbidity to women who have vaginitis.
  • No real studies done on this so dealing with correlations.
trichomonas foetus
Trichomonas foetus

You are not responsible for the 9 topics for this parasite!

trichomonas foetus1
Trichomonas foetus

You are not responsible for the 9 topics for this parasite!

trichomonas foetus2
Trichomonas foetus

Initial vaginitis 2-3 wks invades uterus and attacks fetus about 7 wks gestation.

You are not responsible for the 9 topics for this parasite!

trichomonas foetus3
Trichomonas foetus
  • Transmitted to cows during coitus.
  • Most cows self-cure after developing immunity.
  • Bulls however are permanent carriers and sources of infection.

You are not responsible for the 9 topics for this parasite!

trichomonas foetus4
Trichomonas foetus
  • To check if a herd is infected with T. foetus, the most reliable way is to test bulls.

You are not responsible for the 9 topics for this parasite!

trichomonas foetus5
Trichomonas foetus
  • To check if a herd is infected with T. foetus, the most reliable way is to test bulls.
  • A sample is taken from the back areas of the penis and inner sheath by either scraping with a pipette (dry method) or flushing with sterile saline (wet method).

You are not responsible for the 9 topics for this parasite!

trichomonas vaginalis treatment
Trichomonas vaginalis Treatment
  • Flagyl- 3 times a day for 4-5 days.
  • Reinfection can happen almost immediately.
  • Vaginal smears to see if infected for diagnosis.
  • Prognosis full recovery (100%).
trichomonas vaginalis epidemiology
Trichomonas vaginalis Epidemiology
  • Sexual contact.
  • Soiled clothing/linens; sharing of wash cloth, clothing, etc.
  • T. vaginalis can live in moist clothing for one day!
trichomonas vaginalis epidemiology1
Trichomonas vaginalis Epidemiology
  • Also seems to show up in small children: so probably not transmitted sexually.
  • The role of toilets? Feasible but no real evidence.
trichomonas tenax
Trichomonas tenax
  • Habitat is in the mouth; sockets of teeth; gums.
  • Transmitted orally (kissing; sharing food eating or drinking utensils).
  • Associated with peridontal disease, mucous in mouth, but it does not cause this.
  • This is an opportunist  if conditions are right it is easier for it to infect.
trichomonas hominis pentatrichomonas hominis
Trichomonas hominis = Pentatrichomonas hominis
  • Non-pathogenic; endocommensal.
  • Found in large intestine/cecum.
  • Ingestion of troph in contaminated water.
  • Features: Undulating membrane & free flagella.
  • Has 5 anterior flagella.
chilomastix mesnili
Chilomastix mesnili
  • Non-pathogenic; endocommensal.
  • Trophs and cysts in the life cycle.
  • Lives in the cecum.
  • Divides by binary fission.
  • Water borne endocommensal  infected by contaminated water.
p hominis and c mesnili
P. hominis and C. mesnili
  • Even though they are not pathogenic and endocommensal, their presence indicates poor hygiene practices and sanitation.
  • Because of this need to be able to distinguish these from pathogenic organisms.
chilomastix mesnili1
Chilomastix mesnili
  • TROPHOZOITE - 6-24 µm long by 3-20 µm wide.
  • 4 flagella arise from kinetosomes at anterior end; 3 flagella extend anteriorly, 1 extends into the cytostome (flagella are difficult to see in stained trophozoites).
chilomastix mesnili2
Chilomastix mesnili
  • CYST is lemon-shaped; 6 to 10 µm in diameter.
  • Contains single nucleus, cytostome, and retracted flagella.