许多猪没有症状，但另一些则出现急性发热病症，呼吸困难和神经症状，如颤抖，抽搐和肌肉痉挛等。
Many pigs had no symptoms, but others developed acute feverish illness, laboured breathing, and neurological symptoms such as trembling, twitching and muscle spasms.
假设其真的发生了支气管痉挛，很难区分究竟是过敏还是急性哮喘发作。
Assuming that she actually had an episode of bronchospasm, it may be difficult to differentiate between anaphylaxis and an acute asthmatic attack.
哮喘急性发作的治疗是基于支气管痉挛的迅速逆转和控制气道炎症。
Treatment of acute asthma is based on rapid reversal of bronchospasm and arresting airway inflammation.
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