Publications by authors named "Franco Guarda"

() is the causative agent of animal tuberculosis (bTB), infecting and causing disease in several animal species. In areas where there are complex interactions between reservoir hosts and susceptible species, the control of this pathogen is a challenge. The authors report two outbreaks of goat tuberculosis caused by in multi-host ecosystems within two protected natural areas of Sicily, where TB is historically endemic.

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Lambl's excrescences (LE) are fibrous strands typically occurring at coaptation lines of cardiac valves. Although they have been widely reported in human medicine, information on LE occurrence in veterinary medicine is still scarce. The present study aimed to investigate the presence of LE in different freshwater fish and in swordfish.

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Article Synopsis
  • The genus includes blood-feeding parasites that infect various marine species, such as cephalopods and swordfish.
  • A study analyzed 83 swordfish hearts from the Mediterranean Sea, finding that 10 (12.05%) were infected with copepods.
  • The infected hearts exhibited severe inflammation and thickening of the atrial wall, highlighting an unusual localization of the parasites in the heart, which will be further studied through histopathology and genetic methods.
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Anitschkow cells (AC) are a peculiar type of stromal cells observed in myocardium, cardiac valves and coronary vessels wall whose origin, characterization and role remain controversial. In human heart, they represent a histological hallmark of Aschoff nodules in rheumatic fever, but they have also been observed in other myocardial pathologies. Firstly, they have been considered a myocyte-derived cells, but light microscopy, immunohistochemical and ultrastructural studies pointed out that a macrophagic/histiocytic origin cannot be excluded.

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In this study we examined macroscopic and microscopic lesions in the mitral valves of 50 regularly slaughtered horses in Italy. Macroscopically the results were minor. Microscopic lesions to the valve were found in both young and elderly subjects, confirming that there is no correlation between age and onset of lesions.

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Objectives: Intramural coronary arteriosclerosis has been reported in several species, but no systematic studies are currently available in bovine. The present study aimed to describe the arteriosclerotic changes in regularly slaughtered veal calves and beef cattle.

Animals: Twenty-five veal calves (6-9 months old) and 17 beef cattle (10-24 months old) housed in intensive livestock farming and regularly slaughtered were included in the present study.

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Article Synopsis
  • A retrospective study examined the parasites in Nebrodi Black pigs, revealing that 4.37% were infected with flukes Fasciola hepatica and Dicrocoelium dendriticum.
  • The pigs showed significant liver damage, including chronic hepatitis, bile duct thickening, and inflammation.
  • The findings highlight the role of pigs as a reservoir for trematode parasites and emphasize the need for preventative measures to protect local livestock and humans.
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The aim of the current study was to evaluate the efficacy of gastric washing for detecting the presence of Helicobacter spp. in feline gastric mucus. Gastric fluids were collected from 11 cats undergoing routine surgical procedures.

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To define the characteristics of malignancy we performed routine histology and an immunohistochemical study on seventeen aortic body tumors in dogs. We essayed tumors using a panel of immunohistochemical markers: neuron specific enolase (NSE), chromogranin A (CrA) and S-100. Among 17 cases, the neoplastic cells were positive for NSE (17 cases, 100%), S-100 (9 cases, 53%), and CrA (8 cases, 47%), respectively.

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