2002
DOI: 10.2307/3285488
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Improved Production of Neospora caninum Oocysts, Cyclical Oral Transmission between Dogs and Cattle, and In vitro Isolation from Oocysts

Abstract: Scarce information is available about Neospora caninum oocysts and sporozoites, in part because only small numbers of oocysts have typically been produced by experimentally infected dogs. We hypothesized that I reason for low experimental production of oocysts is that dogs have been fed tissues from experimentally infected mice instead of tissues from cattle (which are natural intermediate hosts of N. caninum). In this study, 9 dogs were fed tissues from N. caninum-infected calves, and oocyst production was co… Show more

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Cited by 46 publications
(112 citation statements)
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“…The minimum infectious dose of N. caninum oocysts needed to infect cattle is not known, but it is no more than 300 oocysts (Gondim et al, 2002). In the present study using coyotes, one 12-week-old pup shed approximately 500 oocysts.…”
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confidence: 86%
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“…The minimum infectious dose of N. caninum oocysts needed to infect cattle is not known, but it is no more than 300 oocysts (Gondim et al, 2002). In the present study using coyotes, one 12-week-old pup shed approximately 500 oocysts.…”
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confidence: 86%
“…1A). The unsporulated oocysts were spherical to subspherical and measured 10 mm in diameter ðn ¼ 10Þ: They were aerated in 2% H 2 SO 4 as previously described (Gondim et al, 2002). After aeration, sporulated oocysts contained two sporocysts, each with sporozoites (Fig.…”
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confidence: 99%
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“…Epidemiological evidence also suggests horizontal transmission [6,8]. Calves [9] and pregnant cows [10] can be experimentally infected by oral administration of Neospora oocyst shed by dogs, and the N. caninum life cycle has been reproduced by cyclical oral transmission between dogs and cattle [11]. In addition, a sylvatic transmission cycle of N. caninum between cervids (white-tailed deer) and canids (dogs, coyotes) has been demonstrated in North America [12].…”
Section: Introductionmentioning
confidence: 99%