A Hammondia-like parasite from the European fox (Vulpes vulpes) forms biologically viable tissue cysts in cell culture

Schares, Gereon

doi:10.1016/s0020-7519(03)00009-2

Cited by 20 publications

(21 citation statements)

References 17 publications

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“…from central Canada were nearly identical with those of H. triffittae at both the COI and 18S rDNA loci suggesting that the range of H. triffittae may include the entire temperate north. Although closely related, H. heydorni exhibits genetic and biological differences from H. triffittae (Schares et al 2002(Schares et al , 2003Abel et al 2006;Gjerde and Dahlgren, 2011).…”

Section: Discussionmentioning

confidence: 99%

Molecular phylogenetic analyses of tissue coccidia (sarcocystidae; apicomplexa) based on nuclear 18s RDNA and mitochondrial COI sequences confirms the paraphyly of the genus Hammondia

Ogedengbe

Whale

et al. 2016

Parasitology Open

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Partial mitochondrial cytochrome c oxidase subunit I (mt COI) sequences were generated from: Toxoplasma gondii (strains 18S rDNA and COI sequences were Bayesian analysed using partitioned nucleotide substitution models [HKY + I + G for 18S; GTR + I + G codon (code = metmt) for COI]. Phylogenetic hypotheses supported a monophyletic Sarcocystidae and its subfamilie with two major clades within the Toxoplasmatinae: (1) a monophyletic clade of Cystoisospora spp. with Nephroisospora eptesici; and (2) a clade of Toxoplasma, Neospora and Hammondia. Within the latter, Hammondia was shown to be paraphyletic; H. heydorni and H. triffittae were monophyletic with N. caninum [canine definitive hosts (DHs)], whereas H. hammondi was monophyletic with T. gondii (feline DHs). A new genus is erected to resolve the paraphyly of the genus Hammondia confirmed using mt COI and combined 18S/COI sequence datasets.

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Section: Discussionmentioning

confidence: 99%

Molecular phylogenetic analyses of tissue coccidia (sarcocystidae; apicomplexa) based on nuclear 18s RDNA and mitochondrial COI sequences confirms the paraphyly of the genus Hammondia

Ogedengbe

Whale

et al. 2016

Parasitology Open

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“…In addition, we also used the NA42/13 cell line and primary embryonic bovine cells (KH-R), previously applied to in vitro isolate N. caninum or Hammondia spp. (Schares et al, 2003(Schares et al, , 2005Basso et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

First in vitro isolation of Besnoitia besnoiti from chronically infected cattle in Germany

Schares

Basso

Majzoub

et al. 2009

Veterinary Parasitology

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“…Epidemiologic studies involving H. heydorni are scarce because it could not be continuously maintained in cell culture, and serological tests have not been developed for this parasite (Mugridge et al 1999;Riahi et al 1995;Schares et al 2003;Speer et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Neospora caninum, Hammondia sp., and Toxoplasma gondii in tissues from slaughtered beef cattle in Bahia, Brazil

et al. 2009

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Neospora caninum, Hammondia sp., and Toxoplasma gondii are parasites with morphological and genetic similarities. N. caninum and T. gondii are important abortive agents of cattle and sheep, respectively, and may infect numerous animal species. Hammondia sp. is not known to induce disease in animals, but may cause confusion in the identification of closely related coccidia. The aim of this study was to investigate infection rates caused by N. caninum, Hammondia sp., and T. gondii in beef cattle using a nested PCR for Toxoplasmatinae rDNA, followed by sequencing of the PCR products. Antibodies to N. caninum and T. gondii were also investigated in the tested animals. Brains and hearts were obtained from 100 beef cattle in a slaughterhouse in Bahia. Seven samples from brain tested positive for Toxoplasmatinae DNA. No positive reactions were found in heart tissues. After sequencing of the PCR products from all positive tissues, five sequences matched with N. caninum and two matched with T. gondii. Antibodies to N. caninum and T. gondii were found in 20% and 26% of the animals, respectively. The confirmation of N. caninum and the absence of Hammondia heydorni in the tested animals is suggestive that cattle are not efficient intermediate hosts of H. heydorni; however further studies need to be performed using a greater variety of tissues and a higher sample size. The detection of T. gondii DNA in bovine tissues reinforces the potential risk of transmission of this parasite to humans and other animals through the consumption of bovine meat.

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A Hammondia-like parasite from the European fox (Vulpes vulpes) forms biologically viable tissue cysts in cell culture

Cited by 20 publications

References 17 publications

Molecular phylogenetic analyses of tissue coccidia (sarcocystidae; apicomplexa) based on nuclear 18s RDNA and mitochondrial COI sequences confirms the paraphyly of the genus Hammondia

Molecular phylogenetic analyses of tissue coccidia (sarcocystidae; apicomplexa) based on nuclear 18s RDNA and mitochondrial COI sequences confirms the paraphyly of the genus Hammondia

First in vitro isolation of Besnoitia besnoiti from chronically infected cattle in Germany

Investigation of Neospora caninum, Hammondia sp., and Toxoplasma gondii in tissues from slaughtered beef cattle in Bahia, Brazil

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