Download - Cocobacili Gram Negativi
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ZoonozeInfectii respiratorii
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Brucella melitensis Brucella abbortus Brucella suis Brucella canis
Francisella tularensis
Pasteurella multocida
Yersinia pestis
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Haemophilus influenzae Haemophilus parainfluenzae
Bordetella pertussis Bordetella parapertussis Bordetella bronchiseptica
Legionella pneumophila
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Cocobacili gram negativi, imobili, uneori capsulati
Produc infectii la animale, la om bruceloza sau febra ondulanta prin contact cu produse provenind de la acestea
Cresc greu, pe medii complexe cu aa, vitamine, glucoza, uneori in atm cu CO2
Colonii mici S (virulente) sau R (nevirulente) Catalaza si oxidaza +, H2S, reduc nitratii
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Antigenic au 2 antigene, A si M in proportii diferite si un antigen de suprafata polizaharidic
Boala este sistemica, de tip septicemic cu numeroase diseminari in organele parenchimatoase si se caracterizeaza prin dezvoltarea intracelulara a germenilor si inflamatie de tip granulomatos di diseminare sanguina
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Cocobacili gram negativi polimorfi, capsulati,cu necesitati deosebite de crestere
Produc infectii respiratorii,pneumonii,otite, epiglotite, abces pulmonar, meningite (la copii)
Exista specii care produc si alte infectii: H. ducreyi (sancru moale), H. aegyptius (conjuctivite)
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Se cultiva numai pe medii cu sange, geloza chocolat cu factori X (hemina) si V (NAD)
Prezinta fenomenul de satelitism, crestere in jurul unei culturi de stafilococ
Biochimic este oxidaza+,catalaza pozitiv, fermenteaza glucoza, se clasifica in 8 biotipuri
Antigenic exista 6 serotipuri a-f, pe baza capsulei (reactie de umflare a capsulei)
Serotipul b (Hib) este principalul patogen
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Cocobacili gram negativi, capsulati, cu corpusculi metacromatici (col. cu albastru de toluidina)
Produc tusea convulsiva si alte infectii ale tractului respirator superior
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Se cultiva pe medii cu sange si substante absorbante- Bordet Gengou
Creste greu, colonii cu aspect de pic. de mercur, hemolitice; evolueaza in 4 faze de la S la R
Fermenteaza, glucoza, lactoza Antigenic prezinta Ag. O si K (serotipuri) Produce toxine: toxina pertussis, adenilat-
ciclaza, citotoxina traheala, endotoxina
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Cocobacili Gram negativi, mici, pleomorfi,se coloreaza prin impregnare argentica pe fragment de tesut sau Giemsa
Majoritatea infectiilor (infectii respiratorii usoare, pneumonii) sunt produse de L. pneumophila (90%) ce prezinta 3 subspecii
Cresc greu pe medii cu drojdie si carbune Coloniile cresc pana la 3 mm, trsanslucide
de tip S Biochimic: catalazo-pozitive, oxidazo-
pozitive
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Antigenic-LPS specific de grup, Ag. Proteice specifice de specie
Produc :proteaze, fosfataze, DN-aze, hemolizine si citotoxine