Fine structure of gamont of Hepatozoon canis.

Murata, Tomoaki; Kanoe, Masamitsu; Horio, Masahiro; Shimada, Muneaki; Yokoyama, Mitsuru; Taura, Yasuho; Nakama, Sanenori

doi:10.2149/tmh1973.21.107

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Stain-resistant capsules were also reported in blood stages of Karyolysus lacertae (Svahn 1975), iǹ`K aryolysus'' sp. (Beyer 1977), in Hepatozoon canis (Murata et al 1993), and in other hemogregarines of uncertain classi®cation (see Mackeras 1961). In other hemogregarinids, encapsulation is less conspicuous or lacking.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of Hemolivia mariae gamonts in the blood of the lizard Tiliqua rugosa and their development to oocyst stage in the tick Amblyomma limbatum

Smallridge

Paperna²

2000

Parasitology Research

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The ultrastructural features of the development of Hemolivia mariae from intra-erythrocytic gamonts in their host, the Australian lizard Tiliqua rugosa, to oocysts containing sporokinetes in their vector, the tick Amblyomma limbatum, are described. Mature intra-erythrocytic gamonts, as well as gamonts ingested by the tick were encased in a thick (30 nm) capsule with distinct suture sites at each of the two apices. In the only image of a presumed syzygy, both partners were still encased. Further stages, the young and ongrowing oocysts, were bound by a membranous wall. Sporokinetes developed within the oocyst around a primordial crystalloid body. The fully differentiated sporokinetes, still resting within the oocyst wall, exhibited a very short conoid in the apical complex and were heavily loaded with crystalloid material.

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Section: Discussionmentioning

confidence: 99%

Ultrastructure of Hemolivia mariae gamonts in the blood of the lizard Tiliqua rugosa and their development to oocyst stage in the tick Amblyomma limbatum

Smallridge

Paperna²

2000

Parasitology Research

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Life Cycle of Hepatozoon Canis (Apicomplexa: Adeleorina: Hepatozoidae) in the Tick Rhipicephalus Sanguineus and Domestic Dog (Canis Familiaris)

Baneth

Samish

Shkap

2007

Journal of Parasitology

175

116

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The life cycle of the apicomplexan protozoon Hepatozoon canis in its natural hosts Rhipicephalus sanguineus (tick) and Canis familiaris (domestic dog) was studied in an experimental infection. Tick nymphs were fed on a naturally infected dog, or they were infected by percutaneous injection of blood. Dogs were inoculated by ingestion of adult ticks containing mature oocysts. Gamonts were in syzygy 24 hr after percutaneous injection of ticks. Early oocysts were detected 96 hr after nymph repletion, and mature oocysts in adult ticks were infective to dogs 40 days postmolt. Merogony was detected in dog bone marrow from 13 days postinoculation (PI) and included meronts containing 20-30 micromerozoites, and a second type with 2-4 macromerozoites. Monozoic cysts were observed in the spleen in conjunction with merogony. Gamontogony with infection of leukocytes by micromerozoites occurred from 26 days PI, and gamont parasitemia, which completed the life cycle, was detected 28 days PI. The length of the life cycle from nymphal attachment to parasitemia in dogs was 81 days. Increased body temperatures were evident from 16 to 27 days PI and paralleled the time of intensive bone marrow merogony. Skeletal pain and recumbency were manifested in 2 dogs. This study further elucidates the life cycle of H. canis and provides a sequential morphologic description of H. canis merogony, gamontogony, and sporogony.

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A New Hepatozoon Species from Dogs: Description of the Causative Agent of Canine Hepatozoonosis in North America

Dk²,

Lindsay³

et al. 1997

The Journal of Parasitology

127

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A new species of Adeleina, Hepatozoon americanum, is described from the skeletal muscle, cardiac muscle, visceral organs, and blood of dogs (Canis familiaris) in the Southern United States. The organism was previously identified as Hepatozoon canis (James, 1905) Wenyon, 1926; however, differences in clinical signs, histopathological and serological findings, gamont size, and ultrastructure define the new species of Hepatozoon. Attempts to transmit the protozoan from infected dogs to nymphal Rhipicephalus sanguineus ticks, the definitive host of H. canis, were not successful.

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Fine structure of gamont of Hepatozoon canis.

Cited by 3 publications

References 11 publications

Ultrastructure of Hemolivia mariae gamonts in the blood of the lizard Tiliqua rugosa and their development to oocyst stage in the tick Amblyomma limbatum

Ultrastructure of Hemolivia mariae gamonts in the blood of the lizard Tiliqua rugosa and their development to oocyst stage in the tick Amblyomma limbatum

Life Cycle of Hepatozoon Canis (Apicomplexa: Adeleorina: Hepatozoidae) in the Tick Rhipicephalus Sanguineus and Domestic Dog (Canis Familiaris)

A New Hepatozoon Species from Dogs: Description of the Causative Agent of Canine Hepatozoonosis in North America

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