Strangles - Revision history

Bara: Redirected page to Streptococcus equi subsp. equi

2011-03-14T16:37:06Z

Redirected page to Streptococcus equi subsp. equi

Kthompson at 11:26, 11 March 2011

2011-03-11T11:26:02Z

Bara at 23:08, 5 March 2011

2011-03-05T23:08:27Z

Bara at 18:26, 3 March 2011

2011-03-03T18:26:43Z

Bara at 18:37, 19 February 2011

2011-02-19T18:37:12Z

Bara at 13:56, 19 February 2011

2011-02-19T13:56:50Z

Bara at 18:13, 17 February 2011

2011-02-17T18:13:59Z

Bara at 17:06, 17 February 2011

2011-02-17T17:06:07Z

Bara at 16:30, 17 February 2011

2011-02-17T16:30:19Z

Bara: Text replace - "Category:Respiratory_Disorders_-_Horse" to "Category:Respiratory Diseases - Horse"

2011-01-07T13:29:34Z

Text replace - "Category:Respiratory_Disorders_-_Horse" to "Category:Respiratory Diseases - Horse"

← Older revision		Revision as of 16:37, 14 March 2011
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−	~~== Introduction<br> ==~~	+	#redirect[[Streptococcus equi subsp. equi]]
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−	~~Strangles is highly contagious upper respiratory disease of equids worldwide. It is caused by the bacteria ''~~[[Streptococcus equi subsp. equi~~]]''.and causes [[Rhinitis\|rhinitis]], [[Pharyngitis\|pharyngitis]], lymphadenitis and [[:Category:Bacterial Myositis\|myositis]]. <br>~~
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−	The disease often occurs where there a high numbers of young horses that are under stress, such as in racing yards. Most animals affected are under 6 years old though the disease is prevalent in all ages. <br>
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−	Transmission is via purulent exudate discharging from upper respiratory tract or from lymph nodes, which is then transmitted to the other horse by direct contact e.g. on stable doors, tack or feed buckets or by inhalation. A chronic carrier state of the disease can occur when bacteria is in the gutteral pouch.  <br>
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−	~~There will be 100% morbidity; 5% mortality in most cases as the disease is so contagious.<br>~~
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−	~~<br>~~
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−	~~== Clinical Signs<br> ==~~
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−	After infection, there is an incubation period 3 to 6 days followed by fever, depression, anorexia, purulent bilateral nasal discharge, swollen, painful regional lymph nodes, especially submandibular and abscessation and rupture of lymph nodes in severe cases. There may also be guttural pouch empyema. <br>Death can occur from pneumonia, breathing difficulties from swollen lymph nodes or [[Muscle Ischaemia\|purpura haemorrhagica]](an immune-mediated disease). <br>Bastard strangle may occasionally occur, with abscessaation in many organs of the body. This will be difficult to diagnose as clinical signs are systemic and varibale, although history of having strangles in the normal form is presumptive.<br>
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−	~~''S. equi'' may also be involved in [[Bacterial skin infections - Pathology#Systemic_bacterial_infections\|cutaneous lesions]].<br>~~
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−	~~<br>~~
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−	~~== Diagnosis<br> ==~~
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−	History and clinical signs are presumptive. Samples need to be taken via deep nasopharyngeal swab and sent off for culture. If present, you will see mucoid colonies with beta-haemolysis. Sugar fermentation allows differentiation of ''S. equi'' from ''S. zooepidemicus'' and ''S. equisimilis'' as the last two are commensals of the upper respiratory tract. PCR can be used to detect asymptomatic carriers. <br>
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−	~~Endoscopy of the gutteral pouch can be performed and samples taken to detect disease in here as this is more difficult to destroy and therefore stronger anitbiotics need to be prescribed.<br>~~
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−	~~<br>~~
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−	~~== Treatment and Control<br> ==~~
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−	In the case of an outbreak''', Penicillin''' should be administered to the affected animal and to in-contact animals. If the affected animal is in the later stages of the clinical disease, such as an abscess is present then treatment with anitbacterials is not necessary.<br>
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−	Isolation of affected animals is required immediately. The yard needs to be shut and no animals are allowed in or out. Strict control needs to be enforced on all personnell in the yard and them made aware they are not to visit another horse or take their vehicle to other yards. Disinfection of all tack, stables, vehicles, boots and any other equipment that has come into contact with infected animals need to be performed.<br>
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−	Control measures to prevent the disease in the quarantine of all in-coming animals. It is important to try and reduce stress on the yard or within groups of horses turned out together and it is neccessary to avoid overcrowding and mixing different age groups.<br>
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−	~~<br>~~
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−	~~== References<br> ==~~
−
−	Interview with Professors Josh Slater and Ken Smith providing an interesting insight into the pathogenesis, prevalence and possible prevention of ''Streptococcus equi'' infections in horses - listen to [http://www.rvc.ac.uk/Review/Podcasts/RVC_Podcast_12.m4a Strangles podcast]
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−	Brown, C.M, Bertone, J.J. (2002) The 5-Minute Veterinary Consult- Equine', Lippincott, Williams & Wilkin<br>Knottenbelt, D.C. A Handbook of Equine Medicine for Final Year Students University of Liverpool<br><br>
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−	~~[[Category:Respiratory_Bacterial_Infections]] [[Category:Respiratory_Diseases_-_Horse]] [[Category:To_Do_-_Review~~]]

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-Caused by ''[[Streptococcus equi subsp. equi]]''
+== Introduction<br> ==
-*Epidemiology
+Strangles is highly contagious upper respiratory disease of equids worldwide. It is caused by the bacteria ''[[Streptococcus equi subsp. equi]]''.and causes [[Rhinitis|rhinitis]], [[Pharyngitis|pharyngitis]], lymphadenitis and [[:Category:Bacterial Myositis|myositis]]. <br>
-*Clinical signs
+The disease often occurs where there a high numbers of young horses that are under stress, such as in racing yards. Most animals affected are under 6 years old though the disease is prevalent in all ages. <br>
-*Diagnosis
+Transmission is via purulent exudate discharging from upper respiratory tract or from lymph nodes, which is then transmitted to the other horse by direct contact e.g. on stable doors, tack or feed buckets or by inhalation. A chronic carrier state of the disease can occur when bacteria is in the gutteral pouch.&nbsp; <br>
-*Treatment and control
+There will be 100% morbidity; 5% mortality in most cases as the disease is so contagious.<br>
-*Gross pathology
+== Clinical Signs<br> ==
-*Interview with Professors Josh Slater and Ken Smith providing an interesting insight into the pathogenesis, prevalence and possible prevention of ''Streptococcus equi'' infections in horses - listen to [http://www.rvc.ac.uk/Review/Podcasts/RVC_Podcast_12.m4a Strangles podcast]
+After infection, there is an incubation period 3 to 6 days followed by fever, depression, anorexia, purulent bilateral nasal discharge, swollen, painful regional lymph nodes, especially submandibular and abscessation and rupture of lymph nodes in severe cases. There may also be guttural pouch empyema. <br>Death can occur from pneumonia, breathing difficulties from swollen lymph nodes or [[Muscle Ischaemia|purpura haemorrhagica]](an immune-mediated disease). <br>Bastard strangle may occasionally occur, with abscessaation in many organs of the body. This will be difficult to diagnose as clinical signs are systemic and varibale, although history of having strangles in the normal form is presumptive.<br>
-[[Category:Respiratory_Bacterial_Infections]]
+''S. equi'' may also be involved in [[Bacterial skin infections - Pathology#Systemic_bacterial_infections|cutaneous lesions]].<br>
-[[Category:To_Do_-_Respiratory]]
+<br>

@@ Line 4: / Line 4: @@
 **[[Respiratory Bacterial Infections - Pathology#Strangles|Strangles]] is a highly infectious disease of horses caused by ''Streptococcus equi'' subsp. ''equi''
 **[[Respiratory Bacterial Infections - Pathology#In Horses|upper respiratory tract disease of horses]] with fever and abscessation of regional lymph nodes
-**Cause [[Rhinitis|rhinitis]], [[Pharyngitis|pharyngitis]], lymphadenitis and [[Muscles Inflammatory - Pathology#Abscesses|myositis]]
+**Cause [[Rhinitis|rhinitis]], [[Pharyngitis|pharyngitis]], lymphadenitis and [[:Category:Bacterial Myositis|myositis]]
 **Outbreaks in groups of young horses
 **Transmitted via purulent exudate discharging from upper respiratory tract or from lymph nodes

@@ Line 19: / Line 19: @@
 **Guttural pouch empyema
 **100% morbidity; 5% mortality
-**Death can occur from pneumonia, breathing difficulties from swollen lymph nodes or [[Muscles Degenerative - Pathology#Ischaemia|purpura haemorrhagica]](an immune-mediated disease)
+**Death can occur from pneumonia, breathing difficulties from swollen lymph nodes or [[Muscle Ischaemia|purpura haemorrhagica]](an immune-mediated disease)
 **Bastard strangle may occasionally occur, with abscessaation in many organs of the body
 **''S. equi'' may be involved in [[Bacterial skin infections - Pathology#Systemic bacterial infections|cutaneous lesions]]
@@ Line 44: / Line 44: @@
 **Bacteraemia with metastatic abscesses - most often to the mesenteric and mediastinal lymph nodes, less frequently, other organs such as [[Liver - Anatomy & Physiology|liver]], kidney and brain can be involved - '''Bastard strangles'''
 **Retropharyngeal abscesses can rupture onto the skin of neck or into the guttural pouch resulting in '''[[Guttural Pouch Empyema|guttural pouch empyema]] or chondroid formation''' - carrier state
-**[[Muscles Degenerative - Pathology#Ischaemia|'''Purpura haemorrhagica''']]: an acute vasculitis causing urticaria and extensive oedema of ventrum, head and distal limbs
+**[[Muscle Ischaemia|'''Purpura haemorrhagica''']]: an acute vasculitis causing urticaria and extensive oedema of ventrum, head and distal limbs
 **[[Laryngeal Hemiplegia|Laryngeal hemiplegia]] due to enlarged retropharyngeal lymph nodes
 **Compression of cranial nerves

@@ Line 41: / Line 41: @@
 **Catarrhal conjunctivitis may be present
 *Less frequently, complications can occur as follows :
-**Purulent inflammation may extent to [[Guttural Pouches - Anatomy & Physiology|guttural pouches]] or [[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|lungs]], [[Sinusitis|sinusitis]]
+**Purulent inflammation may extent to [[Guttural Pouches - Anatomy & Physiology|guttural pouches]] or [[Pneumonia Overview#Infectious causes of pneumonia|lungs]], [[Sinusitis|sinusitis]]
 **Bacteraemia with metastatic abscesses - most often to the mesenteric and mediastinal lymph nodes, less frequently, other organs such as [[Liver - Anatomy & Physiology|liver]], kidney and brain can be involved - '''Bastard strangles'''
 **Retropharyngeal abscesses can rupture onto the skin of neck or into the guttural pouch resulting in '''[[Guttural Pouch Empyema|guttural pouch empyema]] or chondroid formation''' - carrier state

@@ Line 52: / Line 52: @@
 [[Category:Respiratory_Bacterial_Infections]]
-[[Category:Respiratory_Disorders_-_Horse]]
+[[Category:Respiratory Diseases - Horse]]
 [[Category:To_Do_-_Respiratory]]