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Abstract

Microsporidia are widely recognized as important human pathogens with Enterocytozoon bieneusi as the most common species infecting humans and animals, including cattle. Although Brazil has the second largest cattle herd in the world and it is the largest exporter of beef there are no data on the...

Author(s)
Fiuza, V. R. da S.; Lopes, C. W. G.; Oliveira, F. C. R. de; Fayer, R.; Santin, M.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2016, 216, pp 46-51
Abstract

Cattle (Bos taurus) are intermediate hosts for four species of Sarcocystis, namely Sarcocystis cruzi, Sarcocystis hirsuta, Sarcocystis hominis, and Sarcocystis rommeli. Of these four species, mature sarcocysts of S. cruzi are thin-walled (<1 µm), whereas S. hirsuta, S. hominis, and S. rommeli have thick walls (4...

Author(s)
Dubey, J. P.; Wilpe, E. van; Calero-Bernal, R.; Verma, S. K.; Fayer, R.
Publisher
Springer Berlin, Heidelberg, Germany
Citation
Parasitology Research, 2015, 114, 11, pp 4143-4147
Abstract

There are uncertainties concerning the identity and host species specificity of Sarcocystis species of the water buffalo (Bubalus bubalis) and cattle (Bos taurus). Currently, in cattle three species are recognized with known endogenous stages, viz.: S. cruzi (with canine definitive host), S....

Author(s)
Dubey, J. P.; Fayer, R.; Rosenthal, B. M.; Calero-Bernal, R.; Uggla, A.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2014, 205, 1/2, pp 1-6
Abstract

Feces from each of 30 Holstein cattle on a Maryland dairy farm were examined at weekly, bimonthly, and then monthly intervals from 1 week to 24 months of age for the presence of Enterocytozoon bieneusi. DNA was extracted from spores cleaned of fecal debris, and a two-step nested PCR protocol was...

Author(s)
Santín, M.; Fayer, R.
Publisher
Springer-Verlag GmbH, Heidelberg, Germany
Citation
Parasitology Research, 2009, 105, 1, pp 141-144
Abstract

During December 1990, cryptosporidial oocysts were found in the faeces of 8 of 45 zebu calves and 10 of 60 water buffalo calves from Bareilly, Uttar Pradesh, India. The infected animals were 7 to 80 days old. A 2nd survey in the same area, conducted in March, 1992, revealed oocysts of ...

Author(s)
Dubey, J. P.; Fayer, R.; Rao, J. R.
Citation
Journal of Veterinary Parasitology, 1992, 6, 1, pp 55-56
Abstract

Of 16 experimentally infected neonatal dairy calves, 12 were fed paromomycin twice daily in their milk for 11 consecutive days beginning 1 day before oral inoculation with 1.5-2.0 × 106 oocysts of Cryptosporidium parvum. Four calves each in groups A, B, C, and D received total daily doses of 100,...

Author(s)
Fayer, R.; Ellis, W.
Citation
Journal of Parasitology, 1993, 79, 5, pp 771-774
Abstract

Of 13 neonatal calves inoculated orally with 1.5 × 106 oocysts of Cryptosporidium parvum, 7 in group A were fed 5 g boluses of sulfadimethoxine for 21 consecutive days beginning one day before infection, and 6 calves in group B were untreated controls. Calves in group A had diarrhoea for 6-18 days...

Author(s)
Fayer, R.
Citation
Journal of Parasitology, 1992, 78, 3, pp 534-537
Abstract

Oocysts of a Cryptosporidium isolate from guineapigs were not infectious for adult mice, but were infectious for 2 of 3 newborn calves and for suckling mice. However, oocysts isolated from calves or mice infected with guineapig Cryptosporidium were not infectious for guineapigs. Four isolates of C. ...

Author(s)
Chrisp, C. E.; Suckow, M. A.; Fayer, R.; Arrowood, M. J.; Healey, M. C.; Sterling, C. R.
Citation
Journal of Protozoology, 1992, 39, 3, pp 406-409
Abstract

A bovine sarcocystosis (Sarcocystis cruzi) model is used to show that changes in plasma concentrations of insulin-like growth factor-I, growth hormone and somatostatin, as well as the host's immunological response to the parasite via cytokine interactions with the endocrine system, are modulators...

Author(s)
Fayer, R.; Elsasser, T. H.
Citation
Parasitology Today, 1991, 7, 9, pp 250-255
Abstract

Pregnant cows were immunized to produce hyperimmune bovine colostrum (HBC) by intramuscular injection or intramammary infusion (TI) followed by 3 successive TI boosters with Cryptosporidium parvum (Cp) oocyst antigen mixed with Freund's (F) or Ribi (R) adjuvant. Control cows received no Cp....

Author(s)
Fayer, R.; Tilley, M.; Upton, S. J.; Guidry, A. J.; Thayer, D. W.; Hildreth, M.; Thomson, J.
Citation
Journal of Protozoology, 1991, 38, 6, pp 38S-39S

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