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Feline infectious anemia (FIA) is an infectious disease found in felines, causing anemia and other symptoms. The disease is caused by a variety of infectious agents , most commonly Mycoplasma haemofelis (formerly called Haemobartonella before Haemobartonella and Eperythrozoon species were reclassified as mycoplasmas ).
Spots of fresh or clotted blood were seen on the lesions in 25% of persons with anemia compared to 7% without anemia, also a significant difference, p<0.05. In the 109 persons in this study, 15 had reflux esophagitis, 11 had peptic ulcers, and 7 had Barrett's esophagus, but none of these findings correlated with anemia. Thus, in people with ...
About half of cases are due to peptic ulcer disease (gastric or duodenal ulcers). [3] Esophageal inflammation and erosive disease are the next most common causes. [3] In those with liver cirrhosis, 50–60% of bleeding is due to esophageal varices. [3] Approximately half of those with peptic ulcers have an H. pylori infection. [3]
Gastric antral vascular ectasia (GAVE) is an uncommon cause of chronic gastrointestinal bleeding or iron deficiency anemia. [1] [2] The condition is associated with dilated small blood vessels in the gastric antrum, which is a distal part of the stomach. [1] The dilated vessels result in intestinal bleeding. [3]
[1] [2] Complications may include stomach bleeding, stomach ulcers, and stomach tumors. [1] When due to autoimmune problems, low red blood cells due to not enough vitamin B12 may occur, a condition known as pernicious anemia. [3] Common causes include infection with Helicobacter pylori and use of nonsteroidal anti-inflammatory drugs . [1]
When present, symptoms usually relate to painless bleeding, with vomiting blood (hematemesis) and/or black stools . [3] Less often, Dieulafoy's lesions may cause rectal bleeding (hematochezia), or rarely, iron deficiency anemia. Usually, there are no gastrointestinal symptoms that precede the bleeding (abdominal pain, nausea, etc.).
Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide. [14] Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [8] It more commonly affects people of northern European descent. [2]