Publications

transmission and burden and the impact of temperature on two species of vertically transmitted microsporidia.	microsporidia are unusual amongst eukaryotic parasites in that they utilize both vertical and horizontal transmission and vertically transmitted species can cause sex ratio distortion in their host. here we study vertical transmission in two species of feminising microsporidia, nosema granulosis and dictyocoela duebenum, infecting a single population of the crustacean host gammarus duebeni and measure the effect of temperature on parasite transmission and replication. n. granulosis was verticall ...	2006	16442539
targeting of host cell lineages by vertically transmitted, feminising microsporidia.	feminising microsporidian parasites are transmitted vertically from generation to generation of their crustacean hosts. little is known about the mechanisms underpinning vertical transmission, in particular, parasite transmission to the host gonad during host development. here, we investigate the burden and distribution of two species of vertically transmitted, feminising microsporidia (dictyocoela duebenum and nosema granulosis) during early embryogenesis (zygote to eight-cells) of the gammarus ...	2006	16696983
molecular characterisation of the microsporidia of the amphipod gammarus duebeni across its natural range revealed hidden diversity, wide-ranging prevalence and potential for co-evolution.	microsporidia comprise an unusual group of intracellular, eukaryotic parasites that exhibit ubiquitous distribution throughout the animal kingdom. we analysed the small subunit ribosomal gene (ssurdna) using pcr and sequencing and screened 894 gammarus duebeni (crustacea, amphipoda) specimens from 35 european marine and freshwater populations. we discovered considerable hidden microsporidian diversity. blast searches, sequence analysis and phylogenetic analysis revealed intraspecific sequence va ...	2010	20601176
paramyxean-microsporidian co-infection in amphipods: is the consensus that microsporidia can feminise their hosts presumptive?	the current consensus is that microsporidia belong to a select group of parasites capable of causing both intersexuality and complete sex reversal in their hosts. indeed, species such as nosema granulosis and dictyocoela duebenum, which infect amphipod crustaceans, are regularly referred to as 'feminising microsporidians'. this categorisation is based on a combination of findings: that these species are vertically transmitted and occur at a high prevalence of infection in intersex and female amp ...	2012	22609329
microsporidian parasites feminise hosts without paramyxean co-infection: support for convergent evolution of parasitic feminisation.	feminisation of amphipod crustaceans is associated with the presence of at least three microsporidian parasites and one paramyxean parasite, suggesting that the ability to feminise has evolved multiple times in parasites of amphipods. co-infection by a paramyxean with one of the putative microsporidian feminisers, dictyocoela duebenum, has inspired the alternative hypothesis that all feminisation of amphipods is caused by paramyxea and that all microsporidian associations with feminisation are d ...	2015	25747725
invaders, natives and their enemies: distribution patterns of amphipods and their microsporidian parasites in the ruhr metropolis, germany.	the amphipod and microsporidian diversity in freshwaters of a heterogeneous urban region in germany was assessed. indigenous and non-indigenous host species provide an ideal framework to test general hypotheses on potentially new host-parasite interactions, parasite spillback and spillover in recently invaded urban freshwater communities.	2015	26263904
effects of the acanthocephalan polymorphus minutus and the microsporidian dictyocoela duebenum on energy reserves and stress response of cadmium exposed gammarus fossarum.	amphipods are commonly parasitized by acanthocephalans and microsporidians and co-infections are found frequently. both groups of parasites are known to have severe effects on their host. for example, microsporidians can modify host sex ratio and acanthocephalans can manipulate the behavior of the amphipod to promote transmission to the final host. these effects influence host metabolism in general and will also affect the ability of amphipods to cope with additional stressors such as environmen ...	2015	26539331