Erysipelothrix Flashcards
What is the morphology of Erysipelothrix rhusiopathiae?
Gram-positive rods, no spores, no flagella
What is the primary habitat of Erysipelothrix rhusiopathiae?
Alkaline Soil, water, and the tonsils of swine
What is the oxygen requirement for Erysipelothrix rhusiopathiae?
Facultative anaerobe
What is the primary mode of infection for Erysipelothrix rhusiopathiae?
Oral ingestion or skin abrasions
What disease does Erysipelothrix rhusiopathiae cause in swine?
Swine erysipelas
What are the three forms of swine erysipelas?
Acute, subacute, and chronic
What form of swine erysipelas characterized by High fever (41.1°C), deep red patches on the skin, enlarged spleen and lymph nodes, hemorrhages in the stomach and intestines
Acute form Form
What form of swine erysipelas characterized by Diamond-shaped skin lesions (diamond skin disease)
Subacute Form
What form of swine erysipelas characterized by Vegetative endocarditis and arthritis
Chronic Form
What disease does Erysipelothrix rhusiopathiae cause in sheep?
Polyarthritis
What disease does Erysipelothrix rhusiopathiae cause in cattle?
Arthritis (tibio-tarsal, stifle, carpal joints)
What disease does Erysipelothrix rhusiopathiae cause in birds?
Bluecomb disease (cyanotic skin, diarrhea, and death)
What disease does Erysipelothrix rhusiopathiae cause in humans?
Erysipeloid (localized skin infection)
What is the primary virulence factor of Erysipelothrix rhusiopathiae?
Hemolysin
What is the primary mode of entry for Erysipelothrix rhusiopathiae in sheep?
Through docking and castration wounds
What is the primary mode of entry for Erysipelothrix rhusiopathiae in swine?
Oral ingestion or skin abrasions
What is the primary diagnostic method for Erysipelothrix rhusiopathiae?
Growth-agglutination test (Wachstumsprobe test)
What is the appearance of Erysipelothrix rhusiopathiae colonies on blood agar?
Tiny, clear, and glistening colonies with a greenish discoloration
What is the appearance of Erysipelothrix rhusiopathiae in gelatin?
Bottle brush-like growth
What is the primary serotype of Erysipelothrix rhusiopathiae associated with septicemia?
Serotype 1 and 2
What is the primary treatment for swine erysipelas?
Penicillin
What is the primary stress factor that predisposes swine to erysipelas?
Excessive heat and humidity
What is the primary mode of transmission for Erysipelothrix rhusiopathiae in swine?
Through urine, feces, saliva, and vomitus of infected animals
What is the primary mode of transmission for Erysipelothrix rhusiopathiae in birds?
Through contaminated feed and water
