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| | <categorytree mode=pages>Lymph Nodes</categorytree> | | <categorytree mode=pages>Lymph Nodes</categorytree> |
| | </b></big> | | </b></big> |
| − | |logo = path-logo.png | + | |logo = Anat logo.png |
| | }} | | }} |
| − | [[:Category:Lymph Node Responses in Disease]]
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| − | ==Role of the [[Lymph Node in Inflammation]]==
| + | [[Category:Secondary Lymphoid Tissue|A]] |
| − | ''Back to [[Inflammation - Pathology]]
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| − | | |
| − | ==Diseases Involving Reactive Nodes==
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| − | ===Parasitic Diseases===
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| − | ====bovine parasitic bronchitis====
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| − | ====ostertagiasis====
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| − | ====fascioliasis====
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| − | ===Bacterial Diseases===
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| − | ====clostridial====
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| − | | |
| − | ==Diseases Involving Both Reactive Nodes and Lymphadenitis==
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| − | ===[[Tuberculosis - Cattle]]===
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| − | | |
| − | ===viz. brucellosis and Johne's disease===
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| − | * chronicity is caused by persistence of intacellular bacteria in lymph node macrophages
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| − | * Type IV hypersensitivity, but does not result in visible necrosis as in TB
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| − | | |
| − | ===Johne's disease===
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| − | ===Actinobacillosis===
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| − | ===Actinomycosis===
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| − | ===Equine strangles===
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| − | * acute inflammation
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| − | * produce pyogenic or necrotic foci in the drainage nodes
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| − | * involves submaxillary nodes
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| − | | |
| − | ===Streptococcal adenitis or head gland disease===
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| − | * dogs
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| − | * acute inflammation as in above
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| − | | |
| − | ==Diseases Parasitising the Lymphocytes==
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| − | *organism grows in the lymphocytes and ruptures them
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| − | *if large infecting dose
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| − | :- may be rapidly fatal since animal may no tb e able to mount an immunological attack | |
| − | *if smaller infecting dose
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| − | :- loss of mature lymphocytes causes a dramatic stimulation of the remaining lymphocyte precursors
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| − | :- node hyperplasia follows
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| − | :- competition between lymphocytolysis by the organism and lymphocyte production by the nodes
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| − | :- clinically
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| − | ::- may be swelling of the node at one stage and reduction in size at another
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| − | | |
| − | ===canine distemper===
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| − | *virus
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| − | ===swine fever===
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| − | *virus
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| − | ===bovine east coast fever===
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| − | *protozoan
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| − | | |
| − | ===[[Leishmania|Leishmaniasis in the dog]]===
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| − | | |
| − | ==Other Lymphadenopathy==
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| − | ===Lymph node pigmentation===
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| − | *Lungs
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| − | :- anthracosis
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| − | ::- carbon derived from soot finds its way to the local nodes in macrophages
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| − | *Skin
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| − | :- dermatopathic lymphadenopathy or melanic reticulosis
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| − | ::- in pigmented animals, especially black dogs
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| − | ::- chronic inflammatory skin conditions lead to melanin deposition in hyperplastic nodules
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| − | :- also occurs in nodes draining skin melanomas where the pigment may be the result of skin ulceration or secondary tumour deposit
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| − | ::- these two should not be confused since the prognosis is very different following surgery
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| − | | |
| − | ===Emphysema===
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| − | *interstitial emphysema
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| − | :- common in cases of dyspnoea
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| − | :- more commonly affects bovine lung
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| − | ::- due to well developed pulmonary lobulation and hence much loose interstitial lung tissue
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| − | *collection of gas bubbles in bronchial and mediastinal lymph nodes
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| − | :- gas travels to these nodes after gaining entry to the many lymphatic vessels present in the interstitial tissue
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| − | | |
| − | ===Neoplasia===
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| − | * Primary tumours
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| − | ** Lymphosarcoma (lymphoma)
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| − | :- of lymphoid cells with lymph node enlargement
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| − | :- smooth, pale hemogenous but may have areas of necrosis
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| − | :- may cause [[Parathyroid Glands - Pathology#Pseudo-Hyperparathyroidism|pseudo-hyperparathyroidism]]
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| − | * Secondary tumours
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| − | :- nodes often involved in the spread of tumours by extension or metastasis
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| − | :- usually carcinomas
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| − | | |
| − | ==Haemal Lymph Nodes==
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| − | *ruminants only
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| − | *small; dark red/brown
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| − | *develop during foetal life
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| − | :- lymph node primordia which lose their lymph vessles
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| − | :- receive all cells and antigen from the BLOOD
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| − | *functional significance unclear
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| − | *probably respond to blood-borne antigen
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| − | | |
| − | [[Category:Inflammation]]
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