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Toxoplasma gondii – an amazing parasite. A comment to the article of Koshy A.A. et al. „Toxoplasma co-opts host cells it does not invade”

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nr 4

EN

Ubiquitous parasite of humans and endothermic animals Toxoplasma gondii (type Apicomplexa), identified by Nicolle and Manceaux over 100 years ago, is still an object of numerous extensive studies bringing very interesting and often even surprising observations as that announced in the title [1].

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Parasites of the invasive Chinese sleeper Perccottus glenii (Actinopterygii: Odontobutidae) in the region of the first introduction of the Carpathian population

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Kvach Y. , Kutsokon Y. , Janáč M. , Dykyy I. , Dzyziuk N. , Dudliv I. , Nazaruk K.

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2022

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tom Vol. 51, No. 1

1--9

EN

Parasites of the invasive Chinese sleeper (Perccottus glenii) were studied in five different localities at the site of the first introduction of the Carpathian population of this fish. We recorded eight taxa of parasites in Lviv water bodies. The monogenean Gyrodactylus perccotti and the cestode Nippoteania perccotti were recorded in all five lakes studied. These parasites represent Far East species introduced together with their host. Also the copepod Neoergasilus japonicus is a Far East parasite introduced to Europe with its aquaculture vector. Differences between the surveyed bodies of water were mainly related to their local seasonal conditions and watershed characteristics. The current data confirm the presence of co-introduced populations of G. perccotti and N. perccotti, which probably affects the future invasiveness of their host. Due to low acquisition of local parasites, we cannot confirm any significant effect of invasive fish on local parasite assemblages in this region. However, the presence of the non-indigenous copepod, N. japonicus, requires additional attention in the future.

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Zone of interaction between the parasite and the host: protein profile of the body cavity fluid of Gasterosteus aculeatus L. infected with the cestode Schistocephalus solidus (Muller, 1776)

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Kochneva A. , Borvinskaya E. , Smirnov L.

Acta Parasitologica

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2021

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tom 66

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nr 2

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Impressions from the 8th International Verticillium Symposium

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Rataj-Guranowska M.

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2002

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tom 24

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Microsatellite loci-based distribution of Trypanosoma cruzi genotypes from Chilean chronic Chagas disease patients and Triatoma infestans is concordant with a specific host-parasite association hypothesis

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Venegas J. , Diaz F. , Rojas T. , Miranda S. , Jercic M. I. , Gonzalez C. , Conoepan W. , Vargas A. , Pichuantes S. , Gajardo M. , Rodriguez J. , Sanchez G.

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nr 2

EN

The objective of this study was to investigate if there is specific host-parasite association in Chilean populations of Trypanosoma cruzi. For this purpose, two groups of parasites were analyzed, one from chronic chagasic patients, and the other from Triatoma infestans triatomines in three regions of the country. The first group consisted of four types of samples: parasites from peripheral blood of non-cardiopathic T. cruzi infected patients (NB); parasites from their corresponding xenodiagnosis (NX); parasites from peripheral blood of T. cruzi infected cardiopathic patients (CB) and parasites from their xenodiagnostics (CX). The T. infestans sample in turn was from three regions: III, V and M (Metropolitan). The genetic differentiation by the Fisher exact method, the lineage distribution of the samples, the molecular phylogeny and the frequency of multiclonality were analysed. The results show that not only are the groups of T. cruzi clones from Chagas disease patients and vectors genetically differentiated, but also all the sub-groups (NB, NX, CB and CX) from the III, V and M regions. The analysis of lineage distribution was concordant with the above results, because significant differences among the percentages of TcI, TcIII and hybrids (TcV or TcVI) were observed. The phylogenetic reconstruction with these Chilean T. cruzi samples was coherent with the above results because the four chagasic samples clustered together in a node with high bootstrap support, whereas the three triatomine samples (III, V and M) were located apart from that node. The topology of the tree including published T. cruzi clones and isolates was concordant with the known topology, which confirmed that the results presented here are correct and are not biased by experimental error. Taken together the results presented here are concordant with a specific host-parasite association between some Chilean T. cruzi populations.

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The evolution of fish ectoparasite communities - the role of the ice ages

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Harris P. D.

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2008

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tom 54

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nr 4

287-296

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First Records of Conspecific Brood Parasitism in Two Species of Small Passerines : Lesser Whitethroat and Common Linnet

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Wuczyński A. , Hałupka L. , Maroń A.

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tom Vol. 69, nr 2

124--133

EN

We provide the first records of possible conspecific brood parasitism in the lesser whitethroat Sylvia curruca and the common linnet Linaria cannabina, two species of small passerines. In 2018 we found two unusually large clutches, one for each species (8 and 9 eggs, respectively), both containing two distinct egg morphs differing in coloration. Further detailed analysis of egg morphology and brood phenology (in the whitethroat) suggested that the eggs in each nest had been laid by different females. Surprisingly, two seemingly full sized clutches were laid in both nests, a pattern that is unusual in conspecific brood parasitism in passerines, whose nests are typically parasitized with single eggs. Alternatives to conspecific brood parasitism are therefore discussed. We argue that traditional field-based methods, when carefully used, may be sufficient to document brood parasitism recorded during occasional observations. We finally conclude that enlarged broods, resulting from conspecific brood parasitism, are probably more frequent than expected, but they may be often overlooked.