Localización anatómica y proporción de sexos de los tricostrongílidos gastrointestinales en el ganado ovino de la región de Murcia

A total of 181 adult sheep from a slaughterhouse in Cartagena (Murcia) were studied between 1998 and 2001. The content from the abomasum and small intestine was collected and processed in order to quantify and hasidentify trichostrongylids. One hundred and fi fty eight sheep were parasited with 156.889 nematodes: 103.076 were recovered from the abomasum and 53.813 from the small intestine. In both locations the number of females was higher than males, being sex ratio 1,57 in the abomasum and 1,98 in the small intestine. Thirteen species were identifi ed: Teladorsagia circumcincta, T. trifurcata, Marshallagia marshalli, Trichostrongylus vitrinus, T. colubriformis, T. axei, Nematodirus spathiger and N. fi licollis in both abomasums and small intestine; T. davtiani, M. occidentalis and H. contortus only in abomasum and T. capricola and N. abnormalis just in the small intestine.Entre 1998 y 2001 se estudiaron un total de 181 ovejas sacrifi cadas en un matadero de Cartagena (Murcia). El contenido del abomaso y del intestino delgado se recogió y se procesó con objeto de recontar e identificar los tricostrongílidos encontrados. Se contabilizaron 156.889 nematodos en 158 ovejas parasitadas; de ellos, 103.076 localizados en el abomaso y 53.813 en el intestino delgado. En ambas localizaciones el número de hembras superó al de machos, siendo la proporción entre sexos de 1,57 en el abomaso y de 1,98 en el intestino delgado. Se identifi caron trece especies, ocho de ellas en hábitats no comunes: Teladorsagia circumcincta, T. trifurcata, Marshallagia marshalli, Trichostrongylus vitrinus, T. colubriformis, T. axei, Nematodirus spathiger y N. fi licollis en ambos órganos; T. davtiani, M. occidentalis y H. contortus tan solo en el abomaso y T. capricola y N. abnormalis únicamente en el intestino delgado

In vitro treatments for the theront stage of the ciliate protozoan Cryptocaryon irritans

The ciliate protozoan Cryptocaryon irritans Brown, 1951, the ‘marine white spot’, causes one of the most important parasitic fish diseases, with extensive losses every year in mariculture and in the ornamental fish industry. In the present study, we explore the in vitro use of 8 different compounds against the theront (infective) stage of C. irritans; these compounds include extracts of natural products (epigallocatechin gallate (EGCG), L-DOPA, papain), peracetic acid-based compounds (Proxitane® 5:23 and 15% peracetic acid, PAA), quinine-based compounds (quinacrine hydrochloride and chloroquine diphosphate) and hydrogen peroxide. All of these compounds had an effect on theront survival; however, only EGCG caused significant theront mortality when applied in doses ≥50 mg l–1 and over a period of 3 h; papain caused a maximum theront mortality of <50%. We discuss the type of application and potential utility of the compounds tested as part of a management control strategy for C. irritans infections in marine aquaculture and the ornamental fish industry

Pearsonema plica in red foxes (Vulpes vulpes) from semi-arid areas of the Iberian Peninsula

© 2022. The authors. This document is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by /4.0/ This document is the submitted/accepted/ published version of a Published Work that appeared in final form in International Journal for Parasitology: Parasites and Wildlife. To access the final edited and published work see https://doi.org/10.1016/j.ijppaw.2022.08.005The nematode Pearsonema plica is a parasite infecting the urinary bladder of carnivores, with a described prevalence ranging from 1 to 90%. This parasite needs earthworms as intermediate host to complete its life cycle, being the red fox (Vulpes vulpes) a definitive host. The objective of this study was to analyse the prevalence and intensity of P. plica in the red fox population from the Region of Murcia (SE Spain), an area with semi-arid Mediterranean climate. The urinary bladder, kidneys and ureters of 167 red foxes were collected at necropsy, opened and observed to detect adult parasites. The influence of host variables (sex, age and body condition using Kidney Fat Index) and environmental variables (Normalized Difference Vegetation Index, Normalized Difference Moisture Index, Bare Soil Index, temperature, radiation, evapotranspiration, precipitation, Corine Land Cover categories and distance to urban areas) were evaluated using a Generalised Linear Model. Moran index was used to evaluate the parasite spatial aggregation. The prevalence found was very low (2.4%; median abundance 0 nematodes per fox; median intensity 7.5 nematodes per parasitized fox), which contrast with those described in other red fox populations in Europe. Environmental variables had a significant influence on the occurrence of P. plica, being NDMI, mean summer precipitation, percentage of forest and agricultural areas positively associated with P. plica abundance. The south-eastern Iberian Peninsula has a semi-arid climate that hinders the development of the life cycle of this nematode, which justifies its occurrence in specific areas where there are the suitable environmental conditions for the presence of earthworms. However, although semi-arid Mediterranean areas do not seem to be favourable carnivores to be parasitized by P. plica, we cannot underestimate the risk that exists in those areas where, either naturally or by human activity, there are environmental factors that favor the presence of this nematode

In vitro treatments for the theront stage of the ciliate protozoan Cryptocaryon irritans

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