A. Heydorn

Publications96
h-index20
Citations1,341
Highly Influential Citations73
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Oocysts of Neospora caninum, Hammondia heydorni, Toxoplasma gondii and Hammondia hammondi in faeces collected from dogs in Germany.
Faecal samples of 24,089 dogs were examined coproscopically in two veterinary laboratories in Germany between March 2001 and October 2004. In 47 dogs, oocysts of 9-14 microm size were found. Their… Expand
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Another African disease in Central Europa: Besnoitiosis of cattle. I. Light and electron microscopical study
The paper reports the first detection of besnoitiosis of cattle in Germany. Just 2 years after the first appearance of the African Bluetongue disease (BTD) of cattle in Central Europe, another… Expand
  • 48
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Hammondia heydorni-like oocysts shed by a naturally infected dog and Neospora caninum NC-1 cannot be distinguished
Abstract. This study describes transmission experiments using Hammondia heydorni-like oocysts isolated in 1996 from a naturally infected dog. The isolate was designated as H. heydorni-Berlin-1996.… Expand
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Sarcocystis calchasi sp. nov. of the domestic pigeon (Columba livia f. domestica) and the Northern goshawk (Accipiter gentilis): light and electron microscopical characteristics
A novel highly pathogenic Sarcocystis species has been shown to cycle between the Northern goshawk (Accipiter gentilis) as definitive host and the domestic pigeon (Columba livia f. domestica) as… Expand
  • 38
  • 5
The sarcosporidia (Protozoa, Sporozoa): life cycle and fine structure.
Publisher Summary Sarcosporidia have adapted their life cycle to the “predator–prey” relationship existing between their hosts. Some carnivores may be final hosts of several sarcocystis species and… Expand
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Effects of toltrazuril and ponazuril on the fine structure and multiplication of tachyzoites of the NC-1 strain of Neospora caninum (a synonym of Hammondia heydorni) in cell cultures
Rhesus monkey kidney cell cultures were used to propagate tachyzoites of the NC-1 strain of Neospora caninum (syn. Hammondia heydorni). The infected cell cultures were incubated for 4–12 h in media… Expand
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Besnoitia besnoiti: Studies on the definitive host and experimental infections in cattle
Domestic cats, 11 other species of carnivorous mammals, 6 species of snakes, and whitebacked vultures were tested for their possible role as definitive hosts ofBenoitia besnoiti by feeding with… Expand
  • 59
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The fine structure of cysts ofSarcocystis moulei from goats
Sarcocysts are often found in muscles of naturally infected goats. The original name Sarcocystis moulei, given by Neveu-Lemaire in 1912, did not differentiate between macroscopically and… Expand
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In contrast to dogs, red foxes (Vulpes vulpes) did not shed Neospora caninum upon feeding of intermediate host tissues
Abstract. To clarify whether red foxes (Vulpes vulpes) can be final hosts of Neospora caninum, foxes and dogs were fed in parallel on tissues of a sheep and a goat experimentally infected with N.… Expand
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Cyclic transmission of Neospora caninum: serological findings in dogs shedding oocysts
Abstract. In a previous paper we demonstrated that Hammondia heydorni-like oocysts isolated in 1996 from a naturally infected dog could not be distinguished from the isolate Neospora caninum NC-1.… Expand
  • 38
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