|Etiologic agent or disease||Age||Clinical Profile||Lesion Profile||Epidemiology||Mortality|
|Escherichia coli||Any age. More frequent from 1 to 4 days old, and at 3 weeks old.||
Depends on the strain.
Usually pasty or liquid diarrhea with dehydration and a stained perinea. Alkaline pH.
|Stomach full of curdled milk. Distended and congested small intestine. Liquid content with mucus and gas.||
Morbidity: very variable according to the strain. From piglets or isolated litters, up to almost 100 %.
More frequent in primiparous litters or litters of sows with hypogalactia or agalactia.
|Depends on the strain, sometimes very high.|
Cl. perfringens Type C
(Newborn Hemorrhagic Enteritis)
|12-72 hours.||Yellowish, bloody diarrhea, prostration and vomiting. Subacute forms with yellowish feces, with necrotic residues.||Bloody ascites: Small intestine: intense hemorrhagic enteritis, above all the jejunum and ileum. Subacute: small intestine with a friable intestinal mucous wall with necrotic membranes.||
Most associated with dirty farrowing pens or udders, although not always.
Sometimes frequent in new farms or in primiparous litters.
|Acute: almost 100 % of piglets affected.|
|Cl. perfringens Type A (Necrotic enteritis)||Can appear from 1 to 7 days, or later.||Yellowish or greyish pasty diarrhea that stains the perinea. Unsightly, dehydration and stunted growth.||
Small intestine: pasty content.
Necrotic material adhered to the mucous membrane.
Affects some piglets per litter, sometimes the heaviest.
|Variable, can be high.|
|Cl. difficile (Neonatal typhlocolitis)||1-7 days.||Yellowish and pasty diarrhea. Dyspnoea and abdominal distention.||Ascites and/or abdominal distention. Ascending colon and coecum: visible mesenteric edema. Intestinal wall sometimes with focal necrosis.||
Appears in the first week of life.
Usually affects a large part of the piglets in some litters.
|Over 50 %|
|6-14 days (not before 5 days, and more frequent around 7 days)||Yellowish, pasty diarrhea, turning liquid later. No response to antibiotics. Very dirty piglets. Bristled hair.||Jejunum and ileum mainly. Pasty content and congestive to fibrinonecrotic enteritis. No lesions in the large intestine.||Slow dissemination, increasing the morbidity which can reach up to 80%||Low:<5 %|
|Rotavirus||1-5 weeks.||Watery or pasty diarrhea, more serious in newborns. Acid pH feces. No response to antibiotics.||Milk or curd in the stomach. Small intestine wall thinned.||Epizootic form (rare): quick start and rapid dissemination. Epizootic form: affects isolated litters. Variable morbidity, can reach up to 80%||Low: 5% to 25 %|
Others, rare in lactation:
|Salmonelosis||Around 3 weeks.||Watery or liquid diarrhea.||Small and large intestine.||Morbidity: up to 50 %||Up to 50 %|
|Swine Disentery||More than 2 weeks.||Watery diarrhea with blood and mucous.||Only large intestine.||Very rare, only in some litters or in some piglets.||Low:0-5 %|