Lymph Node in Inflammation - Revision history

Bara at 18:05, 29 June 2012

2012-06-29T18:05:46Z

Bara at 15:31, 16 March 2012

2012-03-16T15:31:14Z

Bara at 16:14, 10 January 2011

2011-01-10T16:14:48Z

Aimee.e.hicks: /* Septicaemia */

2011-01-06T15:43:39Z

Septicaemia

Aimee.e.hicks: /* =Strangles */

2011-01-06T15:43:13Z

=Strangles

Aimee.e.hicks at 15:42, 6 January 2011

2011-01-06T15:42:58Z

Bara at 12:13, 4 January 2011

2011-01-04T12:13:52Z

Suzannah.stacey: /* Introduction */

2010-09-14T20:16:56Z

Introduction

Bara at 14:58, 16 August 2010

2010-08-16T14:58:51Z

Bara at 14:58, 16 August 2010

2010-08-16T14:58:28Z

@@ Line 1: / Line 1: @@
 ==Introduction==
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 <br><br>
 {{Jim Bee 2007}}
 [[Category:Lymph Nodes|B]]
 [[Category:A&P Done]]

@@ Line 29: / Line 29: @@
 The capillaries in tissues taken immediately after death show bacteria in their lumens.
+<br><br>
 [[Category:Lymph Nodes|B]]
 [[Category:A&P Done]]

@@ Line 5: / Line 5: @@
 When stimulated by antigen presentation, the respective areas undergo an increase in size by hyperplasia. The lymphocytes produced, later leave the lymph node to seek out the source of the antigen in the damaged portion. Bacteria surviving the initial local inflammatory reaction also travel to the lymph node, either in macrophages or as a bacteraemia/septicaemia.
-In the lymph node, many bacteria are trapped, degraded and killed, or exposed to antibody produced by plasma cells in the medullary area. The bacteria therefore set up an acute inflammatory response in the lymph node. If they are pyogenic, baceria can produce abscessation in the lymph node, e. g. Strangles.
+In the lymph node, many bacteria are trapped, degraded and killed, or exposed to antibody produced by plasma cells in the medullary area. The bacteria therefore set up an acute inflammatory response in the lymph node. If they are pyogenic, bacteria can produce abscessation in the lymph node, e. g. Strangles.
-===Strangles===
+'''[[Strangles]]'''
 An upper respiratory tract pathogen in the horse. Abscesses in the cervical lymph nodes burst to the exterior and abscesses in the retropharyngeal node burst into the pharynx . Infection is usually localised to the head and neck, but can spread to cause abscessation elsewhere in the body.
-Bacteria may continue through the lymph nodes and circulate in the blood. These are then generally cleared from the blood by other organs containing phagocytes. E.g. the [[Liver - Anatomy & Physiology|liver]], [[Spleen - Anatomy & Physiology|spleen]] and lungs. There are, however, species differences in the ability to remove bacteria. In most species, the majority of clearance is carried out by the [[Liver - Anatomy & Physiology|liver]] and spleen, however, in the pig, the lung removes 60-80% of such bacteria.
+==Bacteraemia==
-===Septicaemia===
+Bacteria may continue through the lymph nodes and circulate in the blood. These are then generally cleared from the blood by other organs containing phagocytes, e.g. the [[Liver - Anatomy & Physiology|liver]], [[Spleen - Anatomy & Physiology|spleen]] and lungs. There are, however, species differences in the ability to remove bacteria. In most species, the majority of clearance is carried out by the [[Liver - Anatomy & Physiology|liver]] and spleen, however, in the pig, the lung removes 60-80% of such bacteria.
-Septicaemia is a condition where there are highly pathogenic bacteria circulating and rapidly multiplying in the blood. This is accompanied by severe signs of clinical illness, due to the liberation of bacterial toxins. These signs can include; high fever, rapid respiration, shock and can even result in the death of the animal.
 '''Gross appearance'''
@@ Line 29: / Line 31: @@
 [[Category:Lymph Nodes|B]]
-[[Category:To Do - AimeeHicks]][[Category:To Do - Review]]
+[[Category:A&P Done]]

@@ Line 20: / Line 20: @@
 '''Gross appearance'''
 The lymph nodes, [[Liver - Anatomy & Physiology|liver]] and spleen are very hyperaemic and swollen.
 '''Histological appearance'''
 The capillaries in tissues taken immediately after death show bacteria in their lumens.
 [[Category:Lymph Nodes|B]]
-[[Category:To Do - AimeeHicks]]
+[[Category:To Do - AimeeHicks]][[Category:To Do - Review]]

@@ Line 7: / Line 7: @@
 In the lymph node, many bacteria are trapped, degraded and killed, or exposed to antibody produced by plasma cells in the medullary area. The bacteria therefore set up an acute inflammatory response in the lymph node. If they are pyogenic, baceria can produce abscessation in the lymph node, e. g. Strangles.
-===Strangles==
+===Strangles===
 An upper respiratory tract pathogen in the horse. Abscesses in the cervical lymph nodes burst to the exterior and abscesses in the retropharyngeal node burst into the pharynx . Infection is usually localised to the head and neck, but can spread to cause abscessation elsewhere in the body.

@@ Line 1: / Line 1: @@
 ==Introduction==
-*  Antigenic material is transported in phagocytes via the tissue lymphatics to the local lymph node.
-* In the subcapsular sinusoids of the lymph node, antigens are exposed to the reticular cell macrophages.
+Antigenic material is transported in phagocytes via the tissue lymphatics to the local lymph node. In the subcapsular sinusoids of the lymph node, antigens are exposed to the '''reticular cell macrophages'''. These macrophages form a meshwork around the subcapsular, cortical and medullary sinusoids and present the antigen to the appropriate lymphocyte population. This is to '''B-cells''' in the follicular centres and to '''T-cells''' in the parafollicular areas.
-** These macrophages form a meshwork around the subcapsular, cortical and medullary sinusoids.
-** These reticular cells present the antigen to the appropriate lymphocyte population.
+When stimulated by antigen presentation, the respective areas undergo an increase in size by hyperplasia. The lymphocytes produced, later leave the lymph node to seek out the source of the antigen in the damaged portion. Bacteria surviving the initial local inflammatory reaction also travel to the lymph node, either in macrophages or as a bacteraemia/septicaemia.
-*** To B-cells in the follicular centres
-*** To T-cells in the parafollicular areas.
+In the lymph node, many bacteria are trapped, degraded and killed, or exposed to antibody produced by plasma cells in the medullary area. The bacteria therefore set up an acute inflammatory response in the lymph node. If they are pyogenic, baceria can produce abscessation in the lymph node, e. g. Strangles.
-* When stimulated by antigen presentation, the respective areas undergo an increase in size by hyperplasia.
-** The lymphocytes produced later leave the lymph node to seek out the source of the antigen in the damaged portion.
+===Strangles==
-* Bacteria surviving the initial local inflammatory reaction also travel to the lymph node.
-** Travel either in macrophages or as a bacteraemia/septicaemia.
+An upper respiratory tract pathogen in the horse. Abscesses in the cervical lymph nodes burst to the exterior and abscesses in the retropharyngeal node burst into the pharynx . Infection is usually localised to the head and neck, but can spread to cause abscessation elsewhere in the body.
 ===Bacteraemia===
-* Bacteria may continue through the lymph nodes and circulate in the blood.
+Bacteria may continue through the lymph nodes and circulate in the blood. These are then generally cleared from the blood by other organs containing phagocytes. E.g. the [[Liver - Anatomy & Physiology|liver]], [[Spleen - Anatomy & Physiology|spleen]] and lungs. There are, however, species differences in the ability to remove bacteria. In most species, the majority of clearance is carried out by the [[Liver - Anatomy & Physiology|liver]] and spleen, however, in the pig, the lung removes 60-80% of such bacteria.
 ===Septicaemia===
-====Histological Appearance====
+Septicaemia is a condition where there are highly pathogenic bacteria circulating and rapidly multiplying in the blood. This is accompanied by severe signs of clinical illness, due to the liberation of bacterial toxins. These signs can include; high fever, rapid respiration, shock and can even result in the death of the animal.
-* Capillaries in tissues taken immediately after death show bacteria in their lumens.
 [[Category:Lymph Nodes|B]]
-[[Category:To Do - A&P]]
+[[Category:To Do - AimeeHicks]]

← Older revision		Revision as of 12:13, 4 January 2011
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	[[Category:Lymph Nodes\|B]]		[[Category:Lymph Nodes\|B]]
		+	[[Category:To Do - A&P]]

← Older revision		Revision as of 14:58, 16 August 2010
Line 1:		Line 1:
		+	==Introduction==
	* Antigenic material is transported in phagocytes via the tissue lymphatics to the local lymph node.		* Antigenic material is transported in phagocytes via the tissue lymphatics to the local lymph node.
	* In the subcapsular sinusoids of the lymph node, antigens are exposed to the reticular cell macrophages.		* In the subcapsular sinusoids of the lymph node, antigens are exposed to the reticular cell macrophages.

← Older revision		Revision as of 14:58, 16 August 2010
Line 41:		Line 41:


−	[[Category:Lymph Nodes]]	+	[[Category:Lymph Nodes\|B]]