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|a 10.1111/vcp.12879
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|a eng
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|a Henderson, Sally E
|e verfasserin
|4 aut
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|a Large granular lymphocytosis in a cynomolgus macaque (Macaca fascicularis) with a subclinical Trypanosoma cruzi infection
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|c 2020
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|a Text
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|a Date Completed 17.09.2021
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|a Date Revised 17.09.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2020 American Society for Veterinary Clinical Pathology.
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|a A 5.25-year-old cynomolgus macaque (Macaca fascicularis) was found to have a marked leukocytosis due to a lymphocytosis on routine quarantine laboratory data prior to inclusion in a preclinical research study. The majority of lymphocytes were characterized as intermediate to large with round to convoluted nuclei, coarse to clumped chromatin, rare prominent nucleoli, and moderate amounts of lightly basophilic cytoplasm that frequently contained small magenta granules and/or clear vacuoles. The animal had tested negative for several viruses and other etiologic agents found in nonhuman primates 1 week prior to shipment to the research facility. However, further evaluation of the blood smear revealed rare hemoflagellates, and later testing using real-time PCR and ELISA was confirmatory for Trypanosoma cruzi (T cruzi). Trypanosoma cruzi is a zoonotic pathogen responsible for Chagas disease in people and can have negative consequences on study results when positive animals are inadvertently used for preclinical research. This case report describes a marked large granular lymphocytosis in an otherwise healthy macaque as the only indication of infection with T cruzi in an animal believed to be negative for the infection. Additionally, it highlights the diagnostic limitations of screening tests to rule out diseases in animals intended to be used in preclinical studies
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|a Case Reports
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|a Trypanosoma cruzi
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|a granular lymphocytes
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|a hemoflagellates
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| 650 |
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|a nonhuman primate
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|a Pfeiffer, Sara C
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|a Novak, Joseph
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|a Peace, Tracy A
|e verfasserin
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|i Enthalten in
|t Veterinary clinical pathology
|d 1975
|g 49(2020), 3 vom: 09. Sept., Seite 382-388
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|x 1939-165X
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|g volume:49
|g year:2020
|g number:3
|g day:09
|g month:09
|g pages:382-388
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|u http://dx.doi.org/10.1111/vcp.12879
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