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*Pastures can become heavily contaminated, leading to outbreaks
*Pastures can become heavily contaminated, leading to outbreaks
*Transmission via inhalation of dust contaminated with ''R. equi''
*Transmission via inhalation of dust contaminated with ''R. equi''
*Organisms survive inside cells
*Virulence associated with specific surface antigens encoded by a large plasmid
*Virulence associated with specific surface antigens encoded by a large plasmid
*Capsular polysaccharide and mycolic acids in cell wall prevent phagocytosis
*Capsular polysaccharide and mycolic acids in cell wall prevent phagocytosis
*Cell mediated response required to clear infection
*[[Bacterial infections#Rhodococcus equi|Bronchoneumonia]] and lung abscessation in foals less than 4 months
*[[Bacterial infections#Rhodococcus equi|Bronchoneumonia]] and lung abscessation in foals less than 4 months
*Infection associated with under-developed cell-mediated immunity
*Acute disease in 1 month-old foals: acute fever, anorexia, bronchopneumonia
*Acute disease in 1 month-old foals: acute fever, anorexia, bronchopneumonia
*Insidious disease in 2-4 month-old foals with coughing, dyspnoea, weight loss, exercise intolerance, loud, moist rales on lung auscultation
*Insidious disease in 2-4 month-old foals with coughing, dyspnoea, weight loss, exercise intolerance, loud, moist rales on lung auscultation