_curs-angine, infectii streptococice

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 Infectii streptococice. A ngine. Scarlatina. Erizipel

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Page 1: _CURS-Angine, Infectii Streptococice

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Infectii streptococice. Angine.

Scarlatina. Erizipel

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Angine

Inflamatia amigdalelor/orofaringelui, producand durere

spontana sau provocata de deglutitie (odinofagie)

Infectii frecvente, de cauza virala sau bacteriana

Clasificarea dupa aspectul clinic:

 Angine eritematoase si eritematopultacee

 Angine pseudomembranoase  Angine veziculoase

 Angine ulceroase si ulceronecrotice

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 Angine eritematoase si eritematopultacee

Virusuri - cea mai frecventa cauza (40-80%) 

 ! "inov., Coronav., #i$ov., Adenov., %S",&I%, "u'eola, "ubeola, arotidita, E%

Bacterii: 

 ! Streptococ beta*emolitic grup A

Angine virale:

 ! debut progresiv, angina eritematoasa,manifestari catarale asociate (rinoree, tuse,raguseala), alte manifestari clinice

caracteristice etiologiei virale respective(adenopatie, ras* etc+)

Angine bacteriene:

 ! debut brusc, febra mare, odinofagie intensa,

angina rosie/ eritematopultacee, adenopatiesatelita dureroasa

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 Angine eritematoase si eritematopultacee

Bacteriene: ! Streptococ betaemolitic grup A  - din

anginele bacteriene, ! (0 purtatori sanatosi in populatie,

recrudescente iarna, primavara) ! 012 din anginele eritematopultacee la

adult, 122 la copil

3recventa mare in colectivitati

"edutabila prin complicatii

 Alte bacterii: streptococ , C, 4

5ebut brusc, febra mare, odinofagieintensa, angina rosie/eritematopultacee,adenopatie satelita dureroasa

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 Angine pseu!omembranoase

"ononucleoza infectioasa (cauza cea mai

frecventa) ! frecventa la adolescenti si tineri ! angina este initial eritematopultacee, apoi

se dezvolta falsele membrane care respectalueta, se insoteste de purpura a valului6 altemanifestari caracteristice #7I

#ifteria (boala e$ceptionala in prezent) ! 3alsele membrane sunt foarte aderente,

daca sunt smulse lasa o ulceratie, se refaccu usurinta, au caracter e$tensiv, depasescmarginile amigdalelor, imbraca lueta

 !  Adenopatie importanta cu edem

periganglionar  ! 3ebra inalta ! 3enomene to$ice intense (insuficienta

cardiocirculatorie, oligurie)

Alte cauze (rar): stafilococ, streptococ,

pneumococ

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 Angine veziculoase (ulceratii superficiale)

$erpes simple & (angina erpetica) ! #ic buc*et de vezicule, apoi ulceratii

policiclice bucofaringiene, sensibile, uneori cuaspect *emoragic

 ! 3ebra inalta !  Adenopatii cervicale moderate ! 5urata01 sapt (formele severe beneficiaza

de tratament cu aciclovir)

'osacie A (enterovirus) (erpangina) ! 3ebra, durere faringiana moderata, ! #ici vezicule inflamatorii pe pilieri si val

amigdalian care nu se e$tind la restulmucoasei bucale

 ! %indecare spontana in 28 zile

 Alte cauze de angine ulcerative: !  Aftoza comuna !  Angina 5uguet (febra tifoida) ! oli buloase cu afectarea mucoasei bucale &erpangina

Co$sac9ie A

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 Angine ulceroase si ulceronecrotice

#ononucleoza infectioasa (bilaterala)

 Angina %incent (unilaterala): ! asociatie fuzospirilara (3usobacterium6spiroc*eta)

 ! febra moderata, *alena fetida, odinofagie unilaterala ! adolescent, adult tanar, igiena locala deficitara ! enicilina 4/%, metronidazol

Sancru sifilitic amigdalian (unilaterala)

 ! ulceratie putin profunda, putin dureroasa, indurata

 Angine in cursul *emopatiilor (bilaterale) (agranulocitoza, leucoze acute)

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'omplicatii Angine eritematoase si eritematopultacee:

 ! Complicatii locale supurative:

3legmon periamigdalian (odinofagie importanta, otalgie, trismus, tumefactia pilierilorcu edem de lueta) Supuratii cervicale:

 !  Abces retrofaringian (febra, disfagie, dispnee) !  Adenoflegmon ! Celulite cervicale

 ! Complicatii generale Sindrom poststreptococic Complicatii to$ice

 ! Scarlatina ! Soc to$ic streptococic

Angine pseu!omembranoase (vezi #7I, difterie)

Angine veziculoase (*erpetica) ! Eritem polimorf  ! #eningoencefalita

Angine ulceroase si ulceronecrotice (angina %incent)

 ! 3legmon periamigdalian ! romboflebita 'ugulara cu risc de embolie septica si infarct pulmonar (sindrom ;emierre)

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'lasificarea streptococilor 

 !upa tipul !e emoliza

Alfaemolitici

$emoliza incompleta

inverzirea me!iului

ammaemolitici

*eemolitici

Betaemolitici

(emoliza intinsa+

clara)

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'lasificarea streptococilor !upa criteriul antigenic (Ag polizaari!ic component al peretelui)

rupuri notate cu litere A-$ si ,- (nu sunt cuprinsi streptococii viri!ans+ care nu pot fi grupati !upacriteriul antigenic)

rupul A (.0% !in streptococii patogeni pt omrup Ag ip emoliza $abitat Specia Sin!roame clinice

A Beta /aringe Strp1ogenes Angina

'ai respiratorii Scarlatina

2iele+ anus 3rizipel

2io!ermite

Septicemii

B Beta rogenital Stragalactiae 5nfectii nou nascut

#igestiv 3n!ocar!ite

/aringe Septicemii

5nfectii urinare

' Beta /aringe Strumanus /aringite

2iele lomerulonefrita

# variabil 5ntestin(neemolitici) enital Strbovis 3n!ocar!ite

Streptococi Alfa /aringe Strsalivarius 3n!ocar!ite

viri!ans 'avitatea bucala Strmutans 'arii !entare

Streptococi amma ura 2eptostreptococcus Abces amig!alian

anaerobi neemolitici 5ntestin angrena

Vagin /legmoane

Septicemii

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Scarlatina

#efinitie: boala infectioasa si contagioasa, acuta, endemoepidemica,

caraterizata prin angina si e$antem caracteristic urmat de descuamatie

3tiologie Streptococ beta *emolitic grup A (e$ceptional grup C, 4) oala este produsa de to$ina eritrogena (e$oto$ina) responsabila de e$antem,

febra, sindrom to$ic, fenomene nervoase si digestive. #ortalitatea prin scarlatinaeste in declin continuu la nivel mondial

3pi!emiologie Evolueaza sporadic si cu mici epidemii in sezonul rece, este frecventa la copilul

mic, e$ceptionala la sugar si rara la adult

Sursa: bolnavii, purtatorii de streptococ (rol mai important decat bolnavii care sunt

izolati, tratati)

ransmitere: aerogena directa/indirecta

"eceptivitatea: generala. oala lasa imunitate durabila (prote'eaza de scarlatina,dar nu de alte infectii streptococice), reimbolnavirile sunt produse de alte tipuri

streptococice. Stare de imunitate sau de receptivitate se testeaza prin I5" 5ic9

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Scarlatina

2atogenie

Streptococul se fi$eaza pe celulele epiteliale nazale si faringiene, prolifereaza local fiindresponsabil de faringita si secretia de to$ina care difuzeaza in organism si provoaca eruptia

(prin efect direct asupra sistemului neurovegetativ si reactie de *ipersensibilitate intarziata)

'linic

Incubatie <= zile

Debut  brutal: febra, frisoane, disfagie, dureri abdominale, varsaturi. >biectivangina

eritematoasa, limba saburala, adenopatii subangulomandibulare, ta*icardie

Perioada de invazie: Angina

 ! "osie ! ultacee, cu e$sudat cenusiu distribuit in puncte sau zone care pot conflua luand aspectul

de false membrane ! ?lceronecrotica (&enoc*), cu necroze tisulare ! 4angrenoasa, prin asociere cu anaerobi

6imba (ciclul lingual)

Perioada de eruptie

Perioada de descuamare

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Scarlatina

Incarcata cu depozit cenusiu albicios in prima zi, pt ca apoi sa se descuameze

treptat, incepand de la varf si margini catre baza.

"amane o limba rosie prin desprinderea stratului epitelial (proemina papilelelingualelimba zmeurie), dupa 2= zile de la debut@ apoi limba se epitelizeaza

6imba zmeurie 6imba rosu-incis lucioasa

!upa epitelizare 7limba !e pisica

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Scarlatina

2erioa!a !e eruptie

Eruptie micropapuloasa, aspra

la pipait, rosie,

Incepe pe gat si torace, se

generalizeaza rapid, in 1*

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Scarlatina

3ruptia:

#ai intensa pe fata

anterointerna a membrelor, in

a$ile, pe torace si abdomen

"especta fata, care prezinta o

congestie intensa a obra'ilor,

contrastand cu o paloare

circumorala (facies palmuit,masca 3ilatov)

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Scarlatina

3ruptia:

;a nivelul plicilor de fle$iune ale

membrelor, mai ales la plica cotuluieruptia are un aspect caracteristic sub

forma unor linii *emoragice (pielea

lezata de to$ina este traumatizata de

miscarile de fle$ie)semnul 4rozovici

astia

ersista dupa stingerea eruptiei

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Scarlatina

erioada de eruptie:

E$antemul poate fi:

 ! &emoragic

 ! Cianotic

 ! al, trecut cu vederea

 Alte manifestari clinice:

 ! 3ebra ridicata

 ! #odificari circulatorii (ta*icardie, *A)

 ! &epatomegalie usoara

 !  Atingere renala (nefrita in focar)

 !  Artralgii

 ! Simptome neuropsi*ice (in formele*iperto$ice)

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Scarlatina

2erioa!a !e !escuamare:

5upa 802 zile apare descuamatie pe gat si pulpa degetelor initial, cu

aspect fainos pe trunc*i, in lambouri la nivelul e$tremitatilor membrelor 

5ureaza 1< saptamani

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Scarlatina

#iagnostic

Pozitiv 

Clinic

E$amene de laborator orientative:

;eucocitoza cu #7 Izolarea streptococilor grup A (C, 4) din gat (nu este demonstrat caracterulto$igen)

Cresterea AS;> este inconstanta si tardiva I5" 5ic9 la inceputul bolii si dupa 00 zile (vira'ul de la (6) la () pledeaza pt

scarlatina

Diferential  Eriteme stafilococice (SS) oala Baasa9i Infectii virale: rubeola, ec*o, Co$sac9ie, #7I, adenoviroze o$idermii medicamentoase (lipseste enantemul)

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Scarlatina'omplicatii 9 rare cu tratament AB

oice: miocardita, *epatita, nefritD n focar, suprarenalitD, artitD, encefalitD,Foc to$ic, CI%5 (precoce)

Septice (locale sau la distanta): dacriocistita, sinuzita, otita, meningite, abcescerebral, adenite, adenoflegmoane, flegmon de planseu, sepsis, artrite,bron*opneumonie, abces pulmonar (precoce)

Alergice (G02G12) ! 4lomerulonefrita difuza (dupa infectii faringiene sau cutanate)*ematurie,

proteinurie moderata, I"@ A pt focar streptococic, profila$ia A nu se 'ustifica (risc de recidiva negli'abil)

 ! "AA (artrita, cardita, coreeSHden*am (miscari dezordonate, involuntare,*aotice)

 ! Eritem nodos (dermo*ipodermita nodulara pe fata de e$tensie mb,bilateral, regreseaza spontan in 1 sapt, pot apare in 1 pusee succesive)

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3ritem no!os

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Scarlatina

AA

'onceptia clasica: 2M sau 1M+2m+dovada infectiei streptococice

Criterii ma'ore: artrita, cardita, eritem marginat, noduli #eHnet, coreeCriterii minore: artralgii, febra, AC5 de "AA, sd inflamator, prelungirea interval ",

5ovada infectiei streptococice: cresterea AS;>, izolarea streptococului din gat,scarlatina recenta

'onceptia mo!erna:

Sindrom poststreptococic ma'or: artrita, cardita, coree (corticoterapie6A 2 ani)Sindrom poststreptococic minor: poliartralgii febrile, tulburari de ritm si de conducere,persistenta unui sd inflamator6subfebra dupa angina (AI7Saspirina6A 0 an)

ratament

'urativ 2enicilina + V: ;0000u<,gc<zi la copil+ =-4 " la a!ult+ &0 zile Amoicilina: ;0mg<,gc<zi la copil+ >g<zi la a!ult "acroli!e: eritromicina (&0 zile)+ claritromicina+ azitromicina (; zile)

2reventiv: 2enicilina V< macroli! la contacti ? zile

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 Alte infectii streptococice

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3rizipel

oala infectioasa acuta a tegumentului ce survine unei infectii focalizate custreptococi beta*emolitici din grupul A (mai rar , C), sau stafilococ, caracterizataprin placard de dermita si fenomene generale

3avorizat de: staza venolimfatica, limfedem, traumatism, obezitate, boala generala(diabet, neoplazie)

?neori are caracter recidivant ce evoca *ipersensibilitate la Ag streptococice

Sursa de infectie: diverse infectii streptococice, subiecti purtatori de streptococi

ransmitere: diret/indirect@ contagiozitate redusa

oarta de intrare: solutii de continuitate (escoriatii, micoze, ulceratii)

5upa erizipel nu apare imunitate, ci de predispozitie (recidive)

Este afectat: epiderm, dermul, *ipoderm (poate fi sediul unor procese supurative)

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3rizipel

/orme clinice:

Erizipel membre inferioare

Erizipel fata

Erizipel periombilical la nou nascut

Erizipel perigenital postpartum

Erizipel migrator, serpiginos, eratic (netratat se e$tinde la alte partiale corpului)

Erizipel recidivant

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3rizipel membre inferioare

;ocalizare frecventa

5ebut brusc: frison, febra,stare de rau, durere locala

Infiltrat rosu, cald, indurat,dureros, margini mai putin neteca in erizipelul fetei, uneoriflictene, necroza

 Adenopatie locala

osibila tromboflebita asociata

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3rizipel al fetei

oarta de intrare: leziune

cutanata, rinita, otita, infectie

dentara

5ebut brusc: frison febra, starealterata

;ocal: placard rosu, cald, indurat,

bine delimitat, (burelet), eventual

vezicule si flictene

 Adenopatii pretragiene,

subma$ilare constante

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'omplicatii erizipel

;ocale: necroze, abcese,flegmoane, gangrene (redutabilaeste fasceita necrozantastreptococica, favorizata deutilizarea AI7S, fara A)

4enerale: septicemie, limfangite,adenite supurate, nefrita in focar,glomerulonefrita

Edem cronic dupa erizipelrecidivant

3rizipel plaga operatorie

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3rizipel#iagnostic !iferential: Eriteme solare 5ermite medicamentoase  Abcese, flegmoane Stafilococia maligna a fetei Eritem migrator  Erizipeloid "osenbac*

ratament enicilina 4 01#?, 2- zile, apoi amo$icilina po pl durata totala

01 zile #acrolide in caz de alergie

enicilina antistafilococica (nafcilina) ! etiologe stafilococica

"iscul de tromboza venoasa este mic si nu 'ustifica utilizarea

sistematica a anticoagulantelor 

 AI7S si corticoizii au indicatie discutabila

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Impetigo contagiosa

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  Ectima

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  Fasceită necrotizantă

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