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  1. Everyman’s Enemy (1955 Video)

    Subject
    Biology
    Distribution
    Sale, Video cassette. VHS. col. 19 min.

    The life cycle of the house fly and its importance in the spread of disease, especially typhoid and dysentery. Control measures applicable to refuse sites, food processing factories and hospitals are discussed.

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  2. Lamb Dysentery (1948 Film, Video)

    Subject
    Veterinary science
    Distribution
    Sale, Video cassette. Standard formats. col. 8 min.

    The incidence of the disease, its cause and how it is contracted are described. The symptoms are demonstrated but diagnosis in the field can only be confirmed in the laboratory. Preventative measures are...

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