《人体寄生虫学 Human parasitology》课程教学课件（讲稿）Lectures 15 trichomonas vaginalis

Trichomonas vaginalisTrichomonas vaginalis inhabits the vagina ofofwomen and urethra (and sometimes Prostate)men.Trichomonas vaginalis is the causative organism ofTrichomonasvaginitisorTrichomonas urethritis

Trichomonas vaginalis Trichomonas vaginalis inhabits the vagina of women and urethra (and sometimes Prostate） of men. Trichomonas vaginalis is the causative organism of Trichomonas vaginitis or Trichomonas urethritis

1. Morphology and life cycle1.1 TrophozoiteOnly trophozoites in life cycle, no cyst stagePearor ellipse in shapeFour anterior flagellaCentral skeletal rodnucleusA single lateralflagellumattached10tothepellicle toform an undulatingFIGURE3-31Trichomones teginalis aa seen in permnently stained pregarudnn.membrane（波动膜）

1. Morphology and life cycle 1.1 Trophozoite Only trophozoites in life cycle, no cyst stage Pear or ellipse in shape

Four anterior flagellaNucleusD.Despommier@1996

Trichomonas vaginalis施

Trichomonas vaginalis

Trichomonas vaginalis阴道毛滴虫

Trichomonas vaginalis

OU.LB.-LouisDeVos

sexual intercourse- Infective StageA-Diagnostic StageTrichomonasvaginalisMultiplies by longitudinal2TrophozoiteinTrophozoiteinbinaryfissionvaginaororificevaginal andprostaticofurethrasecretions and urine

1.2 Life cycleOnly trophozoites in life cycle, no cyst stageWomen: vaginatrophozoitesMen: urethra or prostate, testes.epididymis（附睾）The infective stage is trophozoiteThe trophozoites multiplies by binary fission

1.2 Life cycle Only trophozoites in life cycle, no cyst stage trophozoites Women: vagina Men: urethra or prostate, testes, epididymis (附睾） The infective stage is trophozoite The trophozoites multiplies by binary fission

2. Pathogenesis and SymptomsTrichomoniasis is one of the most common sexuallytransmitted diseases, mainly affecting 16-to-35-year old womenThe pathogenic ability has close relationship withTrichomonas vaginalis strains and host's physicalState.Signs and symptoms of infection range from havingno symptoms (asymptomatic) to symptomatic

2. Pathogenesis and Symptoms Trichomoniasis is one of the most common sexually transmitted diseases, mainly affecting 16-to-35- year old women The pathogenic ability has close relationship with Trichomonas vaginalis strains and host’s physical State. Signs and symptoms of infection range from having no symptoms (asymptomatic) to symptomatic

2. Pathogenesis and SymptomsControl the growthAnd reproduction ofparasitesWomenThe vaginalUnderSecretions:NormalNon-pathPh3.8-4.4condition

2. Pathogenesis and Symptoms Women Under Normal condition The vaginal Secretions: Ph3.8-4.4 Control the growth And reproduction of parasites Non-path