{"id":29,"date":"2020-04-30T00:19:00","date_gmt":"2020-04-30T00:19:00","guid":{"rendered":"https:\/\/avo6.com\/index.php\/2020\/04\/30\/virus-de-la-fievre-jaune-la-fievre-hemorragique\/"},"modified":"2022-09-28T20:40:12","modified_gmt":"2022-09-28T20:40:12","slug":"virus-de-la-fievre-jaune-la-fievre-hemorragique","status":"publish","type":"post","link":"https:\/\/avo6.com\/?p=29","title":{"rendered":"Virus de la fi\u00e8vre jaune (La fi\u00e8vre h\u00e9morragique)"},"content":{"rendered":"
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La fi\u00e8vre jaune est une fi\u00e8vre h\u00e9morragique due \u00e0 un virus (virus Amarils) c\u2019est un Arbovirus de la famille des Flavivirideaes<\/span><\/div>\n

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I.\u00a0\u00a0 <\/span><\/span><\/b>Caract\u00e8res virologique du virus\u00a0:<\/span><\/b><\/div>\n
1)<\/span><\/span>Morphologie<\/span><\/u><\/b>\u00a0:<\/span><\/u><\/div>\n
o\u00a0\u00a0 <\/span><\/span><\/span>Virus \u00e0 sym\u00e9trie cubique de 40 \u00e0 100\u014bm de diam\u00e8tre<\/span><\/div>\n
o\u00a0\u00a0 <\/span><\/span><\/span>Ac nucl\u00e9ique est un RNA mono-cat\u00e9naire<\/span><\/div>\n
o\u00a0\u00a0 <\/span><\/span><\/span>Envelopp\u00e9 et sensible \u00e0 l\u2019\u00e9ther<\/span><\/div>\n
2)<\/span><\/span><\/b>Structure antig\u00e9nique\u00a0:<\/span><\/u><\/b><\/div>\n
b <\/span><\/span>Ag soluble\u00a0:<\/span><\/i>form\u00e9 par la nucl\u00e9ocapside<\/span><\/div>\n
b <\/span><\/span>H\u00e9magglutinine\u00a0:<\/span><\/i>peut agglutiner les GR de poussins, elle est antig\u00e9nique et donc le sujet peut synth\u00e9tiser des Ac inhibant.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Il n\u2019existe qu\u2019un seul type de virus et il est non variant.<\/span><\/div>\n
II.\u00a0\u00a0 <\/span><\/span><\/span><\/b>Epid\u00e9miologie\u00a0:<\/span><\/b><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>La fi\u00e8vre jaune est une maladie qui s\u00e9vit dans les r\u00e9gions tropicales d\u2019Afrique et d\u2019Am\u00e9rique.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>C\u2019est essentiellement une maladie de l\u2019animal qui peut atteindre les singes, et n\u2019est transmise \u00e0 l\u2019homme qu\u2019accidentellement apr\u00e8s piq\u00fbre d\u2019un moustique de type A\u00e8des.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>On observe des \u00e9pid\u00e9mies qui surviennent essentiellement \u00e0 la compagne, li\u00e9es au fait que le cycle de passage du virus d\u2019un animal infect\u00e9 \u00e0 un autre sain passe obligatoirement par <\/ins>le moustique.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Si l\u2019homme s\u2019introduit accidentellement dans le cycle, le moustique pique le sujet qui fait la maladie.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>C\u2019est une maladie tr\u00e8s fr\u00e9quente en Ethiopie, Nigeria, quelques pays d\u2019Am\u00e9rique latine et s\u2019observe presque chaque ann\u00e9e.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Il y a des \u00e9pid\u00e9mies urbaines dont le cycle s\u2019entretien entre l\u2019homme malade-moustique- homme sain.<\/span><\/div>\n
III.\u00a0\u00a0 <\/span><\/span><\/span><\/b>Manifestations cliniques\u00a0:<\/span><\/b><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>La fi\u00e8vre jaune dans sa forme typique se pr\u00e9sente comme une h\u00e9paton\u00e9phrite h\u00e9morragique qui est tr\u00e8s souvent mortelle.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Dans sa forme clinique\u00a0:<\/span><\/div>\n
1)<\/span><\/span>Incubation\u00a0:<\/span><\/u> 3 \u00e0 4 jours<\/span><\/div>\n
2)<\/span><\/span>P\u00e9riode d\u2019\u00e9tat\u00a0:<\/span><\/u> sous forme de deux phases\u00a0:<\/u><\/span><\/div>\n
a)\u00a0\u00a0 <\/span><\/span><\/span><\/i>Phase rouge\u00a0:<\/span><\/i> caract\u00e9ris\u00e9e par\u00a0:<\/i><\/span><\/div>\n
b <\/span><\/span>Fi\u00e8vre de plus de 40\u00b0c<\/span><\/div>\n
b <\/span><\/span>Douleurs musculaires<\/span><\/div>\n
b <\/span><\/span>C\u00e9phal\u00e9es<\/span><\/div>\n
b <\/span><\/span>Congestion du visage<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Cette phase correspond \u00e0 la<\/ins> vir\u00e9mie (passage du virus vers le sang)<\/span><\/div>\n
b)\u00a0\u00a0 <\/span><\/span><\/span><\/i>Phase de r\u00e9mission\u00a0:<\/span><\/i><\/div>\n
b <\/span><\/span>Diminution de la temp\u00e9rature<\/span><\/div>\n
b <\/span><\/span>Le sujet appara\u00eet \u00eatre gu\u00e9ri<\/span><\/div>\n
3)<\/span><\/span>Phase jaune<\/span>\u00a0:<\/span><\/u> caract\u00e9ris\u00e9e par:<\/u><\/span><\/div>\n
b <\/span><\/span>Ict\u00e8re tr\u00e8s important qui s\u2019accentue progressivement<\/span><\/div>\n
b <\/span><\/span>H\u00e9morragie cutan\u00e9o-muqeuse <\/span><\/div>\n
b <\/span><\/span>H\u00e9paton\u00e9phrite \u00e0 l\u2019origine d\u2019h\u00e9morragie digestive et le vomito-n\u00e9gro <\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>L\u2019\u00e9volution de la maladie est mortelle en quelques jours, parfois il y a des cas de gu\u00e9rison de l\u2019ict\u00e8re dans la 2\u00e8me<\/sup> ou 3\u00e8me<\/sup>semaine (totale et sans s\u00e9quelles) <\/span><\/div>\n
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IV.\u00a0\u00a0 <\/span><\/span><\/span><\/b>Diagnostic biologique\u00a0:<\/span><\/b><\/div>\n
1)<\/span><\/span><\/b>El\u00e9ments d\u2019orientation\u00a0:<\/span><\/u><\/b><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Ce sont des \u00e9l\u00e9ments\u00a0:<\/span><\/div>\n
\u00a8 <\/span><\/span>Cliniques\u00a0:<\/span><\/i><\/div>\n
\u00a8 <\/span><\/span>Epid\u00e9miologiques\u00a0<\/span><\/i>: comme le retour d\u2019un pays o\u00f9 il y a des \u00e9pid\u00e9mies de fi\u00e8vre jaune<\/span><\/div>\n
\u00a8 <\/span><\/span>Anatomo-pathologique\u00a0<\/span><\/i>: d\u00e9g\u00e9n\u00e9rescence graisseuse des h\u00e9patocytes.<\/span><\/div>\n
2)<\/span><\/span><\/b>Labo-virologie\u00a0:<\/span><\/u><\/b><\/div>\n
\u00a8 <\/span><\/span>Il faut que le laboratoire soit bien \u00e9quip\u00e9<\/span><\/div>\n
\u00a8<\/span><\/span>Il faut entreprendre en plus des conditions de s\u00e9curit\u00e9 maximales<\/i><\/span><\/div>\n
3)<\/span><\/span><\/b>Diagnostique biologique\u00a0:<\/span><\/u><\/b><\/div>\n
a)\u00a0\u00a0 <\/span><\/span><\/span><\/i>Diagnostic direct\u00a0:<\/span><\/i><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>i.\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Pr\u00e9l\u00e8vement\u00a0:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Dans les 4 \u00e0 5 jours qui suivent la maladie au niveau du sang ou des urines<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>ii.\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Inoculation\u00a0:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>Les virus sont inocul\u00e9s \u00e0 des animaux (souriceaux nouveau-n\u00e9s) ou sur des cultures cellulaires<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>iii.\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Mise en \u00e9vidence\u00a0:<\/span><\/div>\n
\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>R\u00e9action d\u2019h\u00e9magglutinatoin avec des GR de poussin <\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>Suivie par <\/span><\/div>\n
\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>R\u00e9action d\u2019IHA avec un s\u00e9rum (+) de r\u00e9f\u00e9rence.<\/span><\/div>\n
b)\u00a0\u00a0 <\/span><\/span><\/span><\/i>Diagnostic indirect\u00a0:<\/span><\/i><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>R\u00e9alis\u00e9 dans les rares cas o\u00f9 il y a gu\u00e9rison par une r\u00e9action d\u2019IHA et fixation du compl\u00e9ment sur une paire de pr\u00e9l\u00e8vement <\/u>\u00a0<\/span><\/span><\/div>\n
V.\u00a0\u00a0 <\/span><\/span><\/span><\/b>Prophylaxie\u00a0:<\/span><\/b><\/div>\n
b <\/span><\/span>Lutte contre les moustiques<\/span><\/div>\n
b <\/span><\/span>Isoler les malades, cliniquement atteints, sous des moustiquaires <\/span><\/div>\n
b <\/span><\/span>Vaccination<\/span><\/div>\n
\u00a0 <\/span>\u00a0\u00a0\u00a0<\/span>Il y\u00a0 <\/span>a deux vaccins connus\u00a0:<\/span><\/div>\n
\u00a7\u00a0 <\/span><\/span><\/span>Vaccin DAKAR\u00a0:<\/span><\/u>pratiquement abandonn\u00e9 car il est pr\u00e9par\u00e9 sur cellules de cerveau de sourie (vaccin inactiv\u00e9)<\/u><\/span><\/div>\n
\u00a7\u00a0 <\/span><\/span><\/span>Vaccin 17 Rockefeller\u00a0:<\/span><\/u> pr\u00e9par\u00e9 sur des embryons de poulet, inactiv\u00e9, se conserve lyophilis\u00e9 \u00e0 \u201330\u00b0c, administr\u00e9 en une seule injection sous cutan\u00e9e dans des centres sp\u00e9cialis\u00e9s. C\u2019est un excellent vaccin qui peut induire une immunit\u00e9 qui peut durer au moins 10 ann\u00e9es.<\/u><\/span><\/div>\n<\/div>\n
Le site www.avo6.com propose un contenu \u00e9ditorial pour pr\u00e9server au mieux sa sant\u00e9. Des conseils et astuces qui vous accompagneront dans votre quotidien autour de la nutrition, les m\u00e9dicaments, beaut\u00e9, les analyses m\u00e9dicales, le bien-\u00eatre et les actualit\u00e9s m\u00e9dicales.<\/div>\n","protected":false},"excerpt":{"rendered":"

La fi\u00e8vre jaune est une fi\u00e8vre h\u00e9morragique due \u00e0 un virus (virus Amarils) c\u2019est un Arbovirus de la famille des…<\/p>\n","protected":false},"author":2,"featured_media":396,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[3],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/posts\/29"}],"collection":[{"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/avo6.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29"}],"version-history":[{"count":1,"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/posts\/29\/revisions"}],"predecessor-version":[{"id":397,"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/posts\/29\/revisions\/397"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/avo6.com\/index.php?rest_route=\/wp\/v2\/media\/396"}],"wp:attachment":[{"href":"https:\/\/avo6.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/avo6.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/avo6.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}