Caseous lymphadenitis - Revision history

Prab at 00:38, 27 April 2025

2025-04-27T00:38:48Z

← Older revision		Revision as of 00:38, 27 April 2025
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	\| frequency = Common in [[sheep]] and [[goat]] populations worldwide		\| frequency = Common in [[sheep]] and [[goat]] populations worldwide
	}}		}}
	~~[[File:Crexho√ªles_froumaedjreces_berbis3.jpg\|left\|thumb]]~~ '''Caseous lymphadenitis''' (CLA) is a [[chronic]] [[bacterial infection]] that primarily affects [[sheep]] and [[goats]]. It is caused by the bacterium ''[[Corynebacterium pseudotuberculosis]]''. The disease is characterized by the formation of [[abscess]]es in the [[lymph nodes]] and internal organs, leading to significant economic losses in the livestock industry due to decreased productivity and increased culling rates.		'''Caseous lymphadenitis''' (CLA) is a [[chronic]] [[bacterial infection]] that primarily affects [[sheep]] and [[goats]]. It is caused by the bacterium ''[[Corynebacterium pseudotuberculosis]]''. The disease is characterized by the formation of [[abscess]]es in the [[lymph nodes]] and internal organs, leading to significant economic losses in the livestock industry due to decreased productivity and increased culling rates.
	==Etiology==		==Etiology==
	The causative agent of caseous lymphadenitis, ''Corynebacterium pseudotuberculosis'', is a [[Gram-positive]] bacterium. It is a facultative intracellular pathogen that can survive and multiply within [[macrophages]]. The bacterium enters the host through skin wounds or mucous membranes and spreads to the regional lymph nodes.		The causative agent of caseous lymphadenitis, ''Corynebacterium pseudotuberculosis'', is a [[Gram-positive]] bacterium. It is a facultative intracellular pathogen that can survive and multiply within [[macrophages]]. The bacterium enters the host through skin wounds or mucous membranes and spreads to the regional lymph nodes.

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2025-04-04T21:26:31Z

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← Older revision		Revision as of 21:26, 4 April 2025
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	[[File:Crexhoûles_froumaedjreces_berbis3.jpg\|thumb~~\|right~~]] '''Caseous lymphadenitis''' (CLA) is a [[chronic]] [[bacterial infection]] that primarily affects [[sheep]] and [[goats]]. It is caused by the bacterium ''[[Corynebacterium pseudotuberculosis]]''. The disease is characterized by the formation of [[abscess]]es in the [[lymph nodes]] and internal organs, leading to significant economic losses in the livestock industry due to decreased productivity and increased culling rates.		{{SI}}
			{{Infobox medical condition
			\| name = Caseous lymphadenitis
			\| image = [[File:Crexhoûles_froumaedjreces_berbis3.jpg\|250px]]
			\| caption = Caseous lymphadenitis in a sheep
			\| synonyms = CLA, pseudotuberculosis
			\| specialty = [[Veterinary medicine]]
			\| symptoms = [[Abscess]]es in [[lymph node]]s, weight loss, decreased wool and milk production
			\| complications = [[Chronic infection]], [[economic loss]] in livestock
			\| onset = Variable, often after [[shearing]] or [[wound]]s
			\| duration = Chronic
			\| causes = ''[[Corynebacterium pseudotuberculosis]]''
			\| risks = [[Sheep]], [[goats]], [[cattle]], [[horses]]
			\| diagnosis = [[Culture (microbiology)\|Culture]], [[serology]], [[PCR]]
			\| differential = [[Tuberculosis]], [[Johne's disease]], [[abscess]]es from other causes
			\| prevention = [[Vaccination]], [[biosecurity]] measures
			\| treatment = [[Antibiotics]], [[surgical drainage]]
			\| prognosis = Guarded, depends on severity and management
			\| frequency = Common in [[sheep]] and [[goat]] populations worldwide
			}}
			[[File:Crexho√ªles_froumaedjreces_berbis3.jpg\|left\|thumb]] '''Caseous lymphadenitis''' (CLA) is a [[chronic]] [[bacterial infection]] that primarily affects [[sheep]] and [[goats]]. It is caused by the bacterium ''[[Corynebacterium pseudotuberculosis]]''. The disease is characterized by the formation of [[abscess]]es in the [[lymph nodes]] and internal organs, leading to significant economic losses in the livestock industry due to decreased productivity and increased culling rates.
	==Etiology==		==Etiology==
	The causative agent of caseous lymphadenitis, ''Corynebacterium pseudotuberculosis'', is a [[Gram-positive]] bacterium. It is a facultative intracellular pathogen that can survive and multiply within [[macrophages]]. The bacterium enters the host through skin wounds or mucous membranes and spreads to the regional lymph nodes.		The causative agent of caseous lymphadenitis, ''Corynebacterium pseudotuberculosis'', is a [[Gram-positive]] bacterium. It is a facultative intracellular pathogen that can survive and multiply within [[macrophages]]. The bacterium enters the host through skin wounds or mucous membranes and spreads to the regional lymph nodes.

	==Clinical Signs==		==Clinical Signs==
	The clinical signs of CLA vary depending on the location of the abscesses. In the external form, abscesses are typically found in the superficial lymph nodes, such as the [[submandibular]], [[prescapular]], and [[prefemoral]] lymph nodes. These abscesses are often visible and palpable. In the internal form, abscesses may develop in internal organs such as the [[lungs]], [[liver]], [[kidneys]], and [[spleen]], leading to more severe systemic signs such as weight loss, decreased milk production, and respiratory distress.		The clinical signs of CLA vary depending on the location of the abscesses. In the external form, abscesses are typically found in the superficial lymph nodes, such as the [[submandibular]], [[prescapular]], and [[prefemoral]] lymph nodes. These abscesses are often visible and palpable. In the internal form, abscesses may develop in internal organs such as the [[lungs]], [[liver]], [[kidneys]], and [[spleen]], leading to more severe systemic signs such as weight loss, decreased milk production, and respiratory distress.

	==Diagnosis==		==Diagnosis==
	Diagnosis of CLA is based on clinical signs, [[bacteriological culture]], and [[polymerase chain reaction]] (PCR) testing. Fine needle aspiration of abscesses followed by culture and identification of ''Corynebacterium pseudotuberculosis'' is a common diagnostic method. Serological tests such as the [[enzyme-linked immunosorbent assay]] (ELISA) can also be used to detect antibodies against the bacterium.		Diagnosis of CLA is based on clinical signs, [[bacteriological culture]], and [[polymerase chain reaction]] (PCR) testing. Fine needle aspiration of abscesses followed by culture and identification of ''Corynebacterium pseudotuberculosis'' is a common diagnostic method. Serological tests such as the [[enzyme-linked immunosorbent assay]] (ELISA) can also be used to detect antibodies against the bacterium.

	==Treatment and Control==		==Treatment and Control==
	Treatment of CLA is challenging due to the intracellular nature of the bacterium and the thick, caseous material within the abscesses. [[Antibiotic]] therapy is often ineffective, and surgical drainage of abscesses is commonly performed. Control measures include strict biosecurity practices, culling of affected animals, and vaccination. Vaccines are available and can reduce the incidence of the disease but do not provide complete protection.		Treatment of CLA is challenging due to the intracellular nature of the bacterium and the thick, caseous material within the abscesses. [[Antibiotic]] therapy is often ineffective, and surgical drainage of abscesses is commonly performed. Control measures include strict biosecurity practices, culling of affected animals, and vaccination. Vaccines are available and can reduce the incidence of the disease but do not provide complete protection.

	==Prevention==		==Prevention==
	Preventive measures are crucial in managing CLA. These include:		Preventive measures are crucial in managing CLA. These include:
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	* Maintaining good hygiene and wound care practices to reduce the risk of infection.		* Maintaining good hygiene and wound care practices to reduce the risk of infection.
	* Using vaccination programs to enhance herd immunity.		* Using vaccination programs to enhance herd immunity.

	==Economic Impact==		==Economic Impact==
	Caseous lymphadenitis has a significant economic impact on the livestock industry. The disease leads to reduced productivity, increased veterinary costs, and higher culling rates. Infected animals may have reduced growth rates, lower milk production, and decreased wool quality. The presence of abscesses can also result in carcass condemnation at slaughter, further increasing economic losses.		Caseous lymphadenitis has a significant economic impact on the livestock industry. The disease leads to reduced productivity, increased veterinary costs, and higher culling rates. Infected animals may have reduced growth rates, lower milk production, and decreased wool quality. The presence of abscesses can also result in carcass condemnation at slaughter, further increasing economic losses.

	==See Also==		==See Also==
	* [[Sheep diseases]]		* [[Sheep diseases]]
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	* [[Bacterial infections in animals]]		* [[Bacterial infections in animals]]
	* [[Livestock management]]		* [[Livestock management]]

	==References==		==References==
	{{Reflist}}		{{Reflist}}

	==External Links==		==External Links==
	{{Commons category\|Caseous lymphadenitis}}		{{Commons category\|Caseous lymphadenitis}}

	[[Category:Sheep diseases]]		[[Category:Sheep diseases]]
	[[Category:Goat diseases]]		[[Category:Goat diseases]]
	[[Category:Bacterial diseases]]		[[Category:Bacterial diseases]]
	[[Category:Livestock diseases]]		[[Category:Livestock diseases]]

	{{medicine-stub}}		{{medicine-stub}}

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2024-05-20T06:32:44Z

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[[File:Crexhoûles_froumaedjreces_berbis3.jpg|thumb|right]] '''Caseous lymphadenitis''' (CLA) is a [[chronic]] [[bacterial infection]] that primarily affects [[sheep]] and [[goats]]. It is caused by the bacterium ''[[Corynebacterium pseudotuberculosis]]''. The disease is characterized by the formation of [[abscess]]es in the [[lymph nodes]] and internal organs, leading to significant economic losses in the livestock industry due to decreased productivity and increased culling rates.

==Etiology==
The causative agent of caseous lymphadenitis, ''Corynebacterium pseudotuberculosis'', is a [[Gram-positive]] bacterium. It is a facultative intracellular pathogen that can survive and multiply within [[macrophages]]. The bacterium enters the host through skin wounds or mucous membranes and spreads to the regional lymph nodes.

==Clinical Signs==
The clinical signs of CLA vary depending on the location of the abscesses. In the external form, abscesses are typically found in the superficial lymph nodes, such as the [[submandibular]], [[prescapular]], and [[prefemoral]] lymph nodes. These abscesses are often visible and palpable. In the internal form, abscesses may develop in internal organs such as the [[lungs]], [[liver]], [[kidneys]], and [[spleen]], leading to more severe systemic signs such as weight loss, decreased milk production, and respiratory distress.

==Diagnosis==
Diagnosis of CLA is based on clinical signs, [[bacteriological culture]], and [[polymerase chain reaction]] (PCR) testing. Fine needle aspiration of abscesses followed by culture and identification of ''Corynebacterium pseudotuberculosis'' is a common diagnostic method. Serological tests such as the [[enzyme-linked immunosorbent assay]] (ELISA) can also be used to detect antibodies against the bacterium.

==Treatment and Control==
Treatment of CLA is challenging due to the intracellular nature of the bacterium and the thick, caseous material within the abscesses. [[Antibiotic]] therapy is often ineffective, and surgical drainage of abscesses is commonly performed. Control measures include strict biosecurity practices, culling of affected animals, and vaccination. Vaccines are available and can reduce the incidence of the disease but do not provide complete protection.

==Prevention==
Preventive measures are crucial in managing CLA. These include:
* Implementing strict biosecurity protocols to prevent the introduction and spread of the bacterium.
* Regularly inspecting animals for signs of abscesses and isolating affected individuals.
* Maintaining good hygiene and wound care practices to reduce the risk of infection.
* Using vaccination programs to enhance herd immunity.

==Economic Impact==
Caseous lymphadenitis has a significant economic impact on the livestock industry. The disease leads to reduced productivity, increased veterinary costs, and higher culling rates. Infected animals may have reduced growth rates, lower milk production, and decreased wool quality. The presence of abscesses can also result in carcass condemnation at slaughter, further increasing economic losses.

==See Also==
* [[Sheep diseases]]
* [[Goat diseases]]
* [[Bacterial infections in animals]]
* [[Livestock management]]

==References==
{{Reflist}}

==External Links==
{{Commons category|Caseous lymphadenitis}}

[[Category:Sheep diseases]]
[[Category:Goat diseases]]
[[Category:Bacterial diseases]]
[[Category:Livestock diseases]]

{{medicine-stub}}