xoắn khuẩn
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Transcript of xoắn khuẩn
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XOAÉN KHUAÅN (Spirochaeta)
Boä (Order) Spirochaetales
Hoï (Family) Spirochaetaceae
Treponemataceae
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Xoắn khuẩn gây bệnh
Treponema, Leptospira, Borrelia
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Xoắn khuẩn
• Gram âm
• dài, mảnh, xoắn
• di động
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Treponema pallidum
- Tinh hoàn thỏ
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Treponema pallidum ÑAËC ÑIEÅM VI SINH VAÄT
Hình theå: daøi 7-8 m; 8-12 soùng löôïn (x 0,6 m).
Caáu truùc:
Truïc baøo töông xoắn
Phức hợp maøng- peptidoglycan.
3-4 noäi chieân mao, daøi hôn nöûa chieàu daøi vi khuaån.
Maøng ngoaøi ñaøn hoài, chöùa phospholipid. Giuùp vi
khuaån neù traùnh ñaùp öùng mieãn dòch cuûa kyù chuû.
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Söùc ñeà khaùng
Deã cheát khi ra khoûi kyù chuû.
Tính chaát nuoâi caáy
Khoâng mọc treân moâi tröôøng nhaân taïo.
Caáu taïo khaùng nguyeân
# 15 khaùng nguyeân chính, ña soá laø lipoprotein.
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Bệnh giang mai
• mạn tính
• diễn tiến chậm
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Beänh giang mai : giang mai kyø I
Saêng (chancre): toån thöông loeùt ñaàu tieân
tích tuï thanh dòch
Töï laønh trong voøng 1-5 tuaàn.
Haïch beïn: hôi söng, nhöng hieám khi meàm.
Khaùng theå: xuaát hieän 1-4 tuaàn sau saêng.
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Beänh giang mai : baåm sinh
3 tuaàn ñeán 6 thaùng sau khi treû chaøo ñôøi
Phì ñaïi gan laùch
Toån thöông da
Vieâm suïn-xöông, bieán daïng raêng vaø xöông
Ñieác, muø, thieåu naêng trí tueä.
Ñeán 50% treû khi sinh khoâng coù trieäu chöùng.
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Beänh giang mai : giang mai kyø II
Toaøn thaân: gioáng caûm cuùm
Chuû yeáu ôû da:
Hoàng ban
U loài giang mai (condylomata lata).
Töï laønh trong # 2-6 tuaàn, taùi hoài trong naêm ñaàu
tieân
Phöùc hôïp mieãn dòch tuaàn hoaøn goàm IgG vaø C3
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Beänh giang mai : thôøi kyø III
10-20 naêm sau laàn nhieãm ñaàu tieân.
Goâm (16%): da, nieâm, xöông, noäi taïng, cô, maét
Toån thöông tim maïch (10%):
vieâm noäi maïc ñoäng maïch chuû
hình thaønh maûng xô vöõa.
Toån thöông thaàn kinh (6,5%): nhieàu daïng.
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Beänh giang mai : thôøi kyø tieàm aån sôùm
Tieán trieån sang tình traïng maïn tính
Keùo daøi ngaén hôn moät naêm
Đöôïc coi laø khoâng laây
Coù theå taùi xuaát hieän ñôït naëng cuûa giang mai kyø II
Mẹ truyeàn sang thai nhi (4 naêm sau laàn nhieãm ñaàu)
neáu khoâng ñieàu trò
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CHAÅN ÑOAÙN VI SINH
Kyõ thuaät hieån vi :
- soi töôi tröïc tieáp döôùi kính hieån vi neàn ñen.
- nhuoäm huyønh quang tröïc tieáp.
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HUYEÁT THANH HOÏC
Khoâng chuyeân bieät :
Khaùng nguyeân : cardiolipin
Kyõ thuaät : VDRL, RPR, ELISA.
Chuyeân bieät :
Khaùng nguyeân vk hay thaønh phaàn vk
Kyõ thuaät : TPI, FTA-ABS, TPHA
Thaám mieãn dòch, ELISA ñaëc hieäu
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Chöa coù vaccin
Phaùt hieän sôùm vaø ñieàu trò trieät ñeå (Pen, Tet)
Phaûn öùng Jarisch-Herxheimer
Theo doõi baèng phaûn öùng huyeát thanh ñònh
löôïng moãi 3 thaùng cho ñeán ít nhaát moät naêm
Giaùo duïc veà tình duïc an toøan