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== Introduction ==

== Introduction ==

Strangles is highly contagious upper respiratory disease of equids worldwide. It is caused by the very pathogenic bacteria ''Streptococcus equi subsp. equi'' resulting in [[Rhinitis|rhinitis]], [[Pharyngitis|pharyngitis]], lymphadenitis and [[:Category:Bacterial Myositis|myositis]]. The bacteria are haemolytic [[:Category:Streptococcus species|streptococci]] of Lancefield group C and are common inhabitants of the equine nasopharynx. They multiply extra-cellularly.

Strangles is highly contagious upper respiratory disease of equids worldwide. It is caused by the very pathogenic bacteria ''Streptococcus equi subsp. equi'' resulting in [[Rhinitis|rhinitis]], [[Pharyngitis|pharyngitis]], lymphadenitis and [[:Category:Bacterial Myositis|myositis]]. The bacteria are haemolytic [[:Category:Streptococcus species|streptococci]] of Lancefield group C and are common inhabitants of the equine nasopharynx. They multiply extra-cellularly. Normally strangle cases are referred to Leahurst Specialists.

The disease often occurs where there are 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.

The disease often occurs where there are 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.