Resumo

MORALES, Abelardo et al. Presence of Helicobacter Like Organisms after twenty one days of treatment in asymptomatic dogs: a preliminar study. AVFT [online]. 2012, vol.31, n.2, pp.34-36. ISSN 0798-0264.

The presence of gastric Helicobacter-like organisms (HLO) in the stomach of dogs and cats has been known for many years, but the relationship between those organisms and gastric disease remains controversial. The objective of this study was to evaluate the presence of Helicobacter like organisms after twenty one days of treatment in asymptomatic dogs. Seven dogs were treated for 21 days with commercial doxycycline at a dose of 20mg/kg/day. Stomach samples were collected by gastroendoscopy from 7 dogs, before an after doxycycline treatment. Gastric tissue sections were prepared and stained with Hematoxilin & Eosin (H & E) for light microscopy. None of these dogs showed previous clinical signs of gastrointestinal disease. In the gastroendoscopy study after of doxycycline treatment we found a normal gastric mucosa in 1/7 dogs, acute superficial gastritis in 3/7, chronic superficial gastritis in 1/7, chronic atrophic gastritis 1/7 and chronic ulcer-erosive gastritis in 1/7. The histopathological study showed acute surface gastritis, focal erosion and hyperkeratosis with lymphocytes infiltration in the lamina propria. The presence of spirochetal shaped bacterias in the gastric mucus and fundus mucous glands were observed associated with gastric lesions. Gastroendoscopy after treatment with doxycycline reveled: 4/7 gastric mucosa normal, 2/7 superficial acute gastritis and 1/7 superficial chronic gastritis. Histopathology showed acute gastritis surface, erosion focal and hyperkeratosis focal infiltrated of lymphocytes in the lamina propria. None samples showed spiral shape bacterial after the treatment with doxyclyne. We conclude that doxycycline is effective for HLO on presence in gastric mucosa of dogs.

Palavras-chave : Helicobacter; canine; doxicicline.