Description: Segment 1 A field of sheep is seen as a male narrator explains what lamb dysentery is and where in the UK it occurs. A farmer births a lamb and the narrator explains that the newborn lamb picks up bacteria from the soil or its mother. A seriously-ill three-day-old lamb is seen lying on the ground. The lamb's hind quarters are seen, with the effects of dysentery (diarrhoea and blood) shown. A dead lamb is seen lying in a field a farmer picks up it by its legs. It is cut open (this is briefly shown) and its intestines are placed in a jar and sent to a laboratory. At the lab, the intestines are emptied onto a tray and a sample taken. This is put into an artificial culture medium and incubated. A drop of this is seen under a microscope. An animation of the bacteria developing into spores is seen. The farm is seen again the narrator describes the way in which disease is spread - via carrion animals such as crows and foxes, and on animals' feet. Preventative methods are seen the first is injecting ewes with vaccine. The second is injected newborn lambs with serum. The narrator explains the benefits of vaccination. Time start: 00:00:00:00 Time end: 00:06:56:06 Length: 00:06:56:06