Ochoa R, de Velandia S
Am J Vet Res. 1978 Jun;39(6):1049-51.
Clostridium perfringens type A enterotoxin seroneutralization was carried out on sera from 50 horses recovered from grass sickness and from 100 other horses with no record of having had the disease. Of the affected horses, 70% had seroneutralizating titers higher than 1:64, half of these being equal or higher than 1:128. More than 88% of the horses with no record of grass sickness had titers lower than 1:64. These data support the theory of association between C perfringens type A toxins and grass sickness.
对50匹从青草搐搦症中康复的马匹以及100匹无该疾病病史的马匹的血清进行了A型产气荚膜梭菌肠毒素血清中和试验。在患病马匹中，70%的血清中和效价高于1:64，其中一半等于或高于1:128。在无青草搐搦症病史的马匹中，超过88%的效价低于1:64。这些数据支持A型产气荚膜梭菌毒素与青草搐搦症之间存在关联的理论。
