Pullorum disease

Japanese: 雛白痢 - ひなはくり（英語表記）pullorum disease

A disease of day-old chickens infected with Salmonella pullorum . It is a legally-contagious livestock disease with a high mortality rate and results in the excretion of white diarrheal stools. Chicks show severe symptoms, but when they become adults, some individuals stop laying or develop collective diarrhea and only excrete the bacteria for a short period of time. The disease in chicks and adult chickens is sometimes collectively called Salmonella pullorum disease. Approximately 30% of eggs laid by infected hens carry the bacteria, but the presence of the bacteria does not reduce fertilization or hatching rates.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

雛白痢菌Salmonella pullorumに感染したニワトリの初生雛の病気。白色の下痢便を排泄し，死亡率の高い家畜法定伝染病である。雛では強烈な症状を呈するが，成鶏になると個体によっては産卵休止でとまるか，集団性の下痢を起こし短期間の排菌でとまる程度となる。雛と成鶏の病気を総合して雛白痢菌症とよぶ場合もある。病菌感染母鶏の産出卵の約30％が保菌しているが，保菌しても受精率や孵化（ふか）率は低下しない。

出典　株式会社平凡社世界大百科事典第２版について　情報

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