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But it is the pig payee the responsible one essential of the transmisión.El period of incubation oscillates from 2 to 19 days with a stocking from 6 to 7 days. The illness shows a variable course, with forms clinical sobreaguda to chronicle, although the intermedias.La diarrhea prevails it is the dominant sign. During the first ones (2 at 10) hours the grounds are mash, and then a plentiful diarrhea is established with excretion of very soft or flowing grounds. Almost from the beginning the excrements contain variable, usually very abundant quantity, of snot and remains of foods without digesting. In some pigs during the whole course of the illness the grounds don't evidence presence of blood, while in other, either from the beginning or to both or three days the diarrhea you bloody restitution in proportion also very variable. The characteristic red color of the blood in the grounds of the youths is darker (black diarrhea") in the pigs of more age. As the illness progresses, the grounds contain less blood, its color is clearer (aspect " achocolatado ") until adopting a gray tonality (" cement " aspect), and it is frequent that they drag tiny and abundant pieces of epithelium intestinal necrosado (aspect of water of rice"). Because of the fecal incontinence the pig defecates they are to carry out effort some, the grounds stain the periné the bragadas and the tail, dripping him and dirtying floors and walls. In the pigs lactantes the illness is uncommon and the grounds diarréicas don't have aspect hemorrágico. As the type, the intensity and the duration of the diarrhea they are very variable and the process setting-up doesn't happen to the unison, in the flock they can be observed in a given moment all the clinical modalities of this síndrome.La illness it causes a colic pain that one manifests precózmente (from the beginning of the diarrhea), for sinking of the flanks, slight arqueamiento of the back and rigid and painful abdomen to the pressure. Slight hipertermia is verified (41 C) previous to the diarrhea, but then the corporal temperature usually remains normal The appetite is not affected in an apparent way in the cases subagudos and chronic, but yes there is anorexy -in not intermittent few times - the sharp cases. The polidipsia is intense. Starting from the second or third day signs of thinness, dehydration and ataxia are already appreciated caused by the weakness, they are affected the production indexes very negatively (I consummate of I think, conversion, daily gain of weight) .El course of the illness hard of some few days up to four weeks. Although some deaths happen without showing symptoms (it forms sobreaguda), and in the benign cases it is only observed reblandecimiento of the grounds and loss of weight, the deaths usually take place in the cases sharp-subagudos during the first two weeks. In the chronic cases the diarrhea becomes intermittent while it persists a general state of weakness and variable appetite. |
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