M8 - Parasitology Flashcards
Protozoa
原生動物
Apicomplexan
頂複門
Flagellates
鞭毛蟲
Amoebae
變形蟲
Ciliates
纖毛蟲
Defining characteristics of Protozoa
Eukaryotes &unicellular
4 main sites of infection for Protozoa
Gastro-intestinal
Vascular
Tissue & organs
5 main routes of transmission for Protozoa
Faecal-oral
Vector-borne
Predator - prey
Aerosol氣溶膠
Sexual
Aerosol
氣溶膠
Phylum
門
Malaria
瘧疾
Recrudescent
復發性(短時間再次出現症狀或加劇)
Relapsing
復發(康復後容易再次復發)
2 main type of plasmodium species
Recrudescent & relapsing
Schizonts
裂殖體:Plasmodium透過sporozoites孢子子進入宿主體內,然後sporozoites會發育分化成schizonts
gamonts
在感染者的血液中,一些 Plasmodium 寄生虫会发展成雄性和雌性 gamonts(配子体)
Sporozoites
孢子子,是入侵宿主的型態
ookinetes
ookinetes(卵块)在蚊子體內发育成 oocysts(卵囊),卵囊内的 sporozoites(孢子子)進入蚊子的唾液腺中以入侵宿主
Babesia species
A kind of Protozoa
Transmission of babes species
Tick-borne碑蟲傳播
2 main features for babes species
Trans-stadial transmission (跨越虫体生命周期传播)
Trans-ovarian transmission (跨越卵子传播)
trans-stadial (larva - nymph - adult)
寄生虫可以在不同生命周期阶段(幼虫、若虫、成虫)中传播和存活
trans-ovarian (infect developing eggs)
寄生虫可以感染发育中卵子,从而传播给下一代
The main transmission of flagellates
Insect vector昆蟲媒介(mainly through sandfly)
Cutaneoes
皮膚
Visceral
內臟
2 main pathological sites of flagellates infection
Cutaneous & visceral
Amastigotes
無鞭毛形態
Exogenous cysts
外源性囊腫:一种休眠和耐干燥的形态,通常存在于感染者的粪便中
Main symptom of Giardia spp. Infection
Diarrhoea
Diarrhoea
腹瀉
Amoebae
變形蟲,又稱阿米巴原蟲
The main transmiss for amoebae
Faecal-oral
feeding trophozoite
滋养虫体,是活跃的寄生虫,它们可以吞噬宿主的组织和细胞,导致组织损伤和感染
Histolysis (soft tissue abscesses)
寄生虫引发的组织损伤过程,通常表现为软组织脓肿(soft tissue abscesses)
Bloody diarrhea
腹泻的一种形式,其特点是粪便中带有血液
Colonic ulceration
结肠溃疡
The main symptom of ciliates
Bloody diarrhea & Colonic ulceration
Three main types of disease for Protozoa
• gastro-enteritis (diarrhoea)
• vascular disorders (anaemia, ischaemia)
• space-occupying lesions (organ malfunction)
Protozoa are small but deadly, because:
• rapid development (® acute diseases)
• amplification in host (® intense infections)