Nematode Parasitism in Small Ruminant Herds in Central Portugal

Matos, A.C.; Cardoso, Luı́s; Brida, Telma; Gavinhos, Catarina; Pedro, Cardoso; Luis, Madeira de Carvalho; Figueira, L.; Martins, Manuel

doi:10.2139/ssrn.4373195

Cited by 2 publications

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“…Although the risk of nematode infection in small ruminants is continuous throughout the year, there are peaks of egg/oocyst shedding in some periods of the year [41]. Animalrelated factors, such as age, physiological phase, and nutritional status [42], and extrinsic factors, such as herd management, animal density, season, and climatic conditions, among others, can affect the prevalence of infection and egg shedding [43,44].…”

Section: Discussionmentioning

confidence: 99%

Pulmonary and Gastrointestinal Parasitic Infections in Small Ruminant Autochthonous Breeds from Centre Region of Portugal—A Cross Sectional Study

Pereira,

Vila-Viçosa,

Coelho

et al. 2024

Animals

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The production of small ruminant autochthonous breeds in the Centre region of Portugal is practiced in a semi-extensive husbandry system, exposing animals to parasitic infections. The main objective of this study was to estimate the prevalence of lungworm infection and identify risk factors. Fecal samples of 203 goats and 208 sheep from 30 herds were collected per rectum and subjected to the modified Baermann test. The overall prevalence of infection was 57.7%, significantly higher in goats (95.6%) than in sheep (20.7%) (p < 0.001). According to the binary logistic regression model, sheep dewormed with albendazole, mebendazole plus closantel, or ivermectin plus clorsulon presented a risk of Protostrongylidae infection 29.702, 7.426, or 8.720 times higher, respectively, than those dewormed with eprinomectin. Additionally, the presence of gastrointestinal parasites was investigated in 307 fecal samples using Mini-FLOTAC®. The overall prevalence of infection was 86.3%, also significantly higher in goats (93.2%) than in sheep (79.9%) (p < 0.001). Strongyle-type eggs were the most frequently identified, both in sheep (69.8%) and goats (87.8%), followed by Eimeria oocysts (40.3% in sheep and 68.9% in goats). Considering the high prevalence and the burden of lungworm parasitic infection, it is urgent to determine its economic impact and the repercussions in animal health in the Centre region of Portugal to establish appropriate therapeutic guidelines.

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Section: Discussionmentioning

confidence: 99%

Pulmonary and Gastrointestinal Parasitic Infections in Small Ruminant Autochthonous Breeds from Centre Region of Portugal—A Cross Sectional Study

Pereira,

Vila-Viçosa,

Coelho

et al. 2024

Animals

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“…Of the bio-polyesters, poly(3-hydroxybutyrate) is the most common PHA. This material has mechanical properties similar to poly(lactic acid) and can be fabricated into diverse plastic products [18,19,20,21,22,23]. Commercial success of PHAs has, however, been hampered by their production costs, which are strongly influenced by the choice of feedstock, as well as the operational expenses (OpEx) of a biotechnological process.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of aHalomonasSpecies for Non-Axenic Growth-Associated Production of Bio-Polyesters from Sustainable Feedstocks

Woo,

Averesch,

Berliner

et al. 2024

Preprint

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Biodegradable plastics are urgently needed to replace petroleum-derived polymeric materials and prevent their accumulation in the environment. To this end, we isolated and characterized a halophilic and alkaliphilic bacterium from the Great Salt Lake in Utah. The isolate was identified as aHalomonasspecies and designated "CUBES01". Full-genome sequencing and genomic reconstruction revealed the unique genetic traits and metabolic capabilities of the strain, including the common polyhydroxyalkanoate (PHA) biosynthesis pathway. Fluorescence staining identified intracellular polyester granules that accumulated predominantly during the strain's exponential growth, a feature rarely found among natural PHA producers. CUBES01 was found to metabolize a range of renewable carbon-feedstocks, including glucosamine and acetyl-glucosamine, as well as sucrose, glucose, fructose, and further also glycerol, propionate, and acetate. Depending on the substrate, the strain accumulated up to ~60% of its biomass [dry w/w] in poly(3-hydroxbutyrate), while reaching a doubling time of 1.7 h at 30°C and an optimum osmolarity of 1 M sodium chloride and a pH of 8.8. The physiological preferences of the strain may not only enable long-term aseptic cultivation but can also facilitate the release of intracellular products through osmolysis. Development of a minimal medium also allowed the estimation of maximum PHB production rates, which were projected to exceed 5 gPHB/h. Finally, also the genetic tractability of the strain was assessed in conjugation experiments: two orthogonal plasmid-vectors were stable in the heterologous host, thereby opening the possibility of genetic engineering through the introduction of foreign genes.

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Nematode Parasitism in Small Ruminant Herds in Central Portugal

Cited by 2 publications

References 0 publications

Pulmonary and Gastrointestinal Parasitic Infections in Small Ruminant Autochthonous Breeds from Centre Region of Portugal—A Cross Sectional Study

Pulmonary and Gastrointestinal Parasitic Infections in Small Ruminant Autochthonous Breeds from Centre Region of Portugal—A Cross Sectional Study

Isolation and Characterization of aHalomonasSpecies for Non-Axenic Growth-Associated Production of Bio-Polyesters from Sustainable Feedstocks

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