Aspecros biomorfol?gicos de Hammondia heydorni (Tadros & Laarman, 1976) Dubey, 1977 (Apicomplexa: Sarcocystidae)

• Author(s): Pereira, Maria Julia Salim
• Date: 2020
• Origin: Oasisbr
• Subject(s): Medicina Veterin?ria; Medicina Veterin?ria
• Document Type: Doctoral thesis
• Language: Portuguese

Description

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Made available in DSpace on 2020-10-27T16:21:03Z (GMT). No. of bitstreams: 1 1987 - Maria Julia Salim Pereira.pdf: 542480 bytes, checksum: 31075375cd0431bbabbf272670e7565b (MD5) Previous issue date: 1987-03-06

Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq

Biomorphological aspects of natural and experimental Hammondia heydorni infections were studied in carnivores and ruminants. The prepatent and patent periods varied in different infections, but the sporulation time of the oocysts was 24 hours in enviromental temperature at 27-32?C, as those submited to controled temperature of 25 ? 1?C. The morphological index of the oocysts from differents hosts confirmed the spherical or subspherical form. In some cases differences of average size of the oocysts originated from samples of different hosts were significant ar level of 5%, however, these differences should be considered as intraspecific variations. N o clinical signs nor pathological findings were observed in infected animals. Histopathological examinations of muscle tissues from ruminants showed forms of the parasite similar to monozoic xvii. cysts, and in the immunofluorescence these parasites had a banana-shaped form. Smears of the small intestine, stained with Giemsa, demonstrated forms of the parasite characterized as meronts, merozoites, macro and microgametocytes.

Foram estudados os aspectos biomorfol?gicos de H. heydorni atrav?s de infec??es experimentais e naturais de carn?voros e ruminantes, observando-se os per?odos pr?-patente e patente e o tempo de esporula??o dos oocistos. Os per?odos pr?-patente e patente variaram com as diferentes infec??es. O tempo de esporula??o dos oocistos foi de 24 horas tanto para oocistos submetidos ? temperatura ambiente (27-32?C) quanto para aqueles submetidos ? temperatura controlada (25 ? 1?C). Os ?ndices morfol?gicos dos oocistos provenientes de diferentes hospedeiros confirmaram a forma esf?rica e subesf?rica destes. Entre as dimens?es m?dias dos oocistos provenientes de amostras procedentes de diferentes hospedeiros, algumas diferen?as foram significativas a n?vel de 5%; entretanto, tais diferen?as devem ser consideradas como varia- ??es intraespec?ficas. XV. N?o se observou qualquer sinal cl?nico nos animais infectados ou qualquer altera??o macrosc?pica ? necropsia. Ao exame histopatol?gico de fragmentos de tecidos musculares de ruminantes foram observadas formas semelhantes a cistos monoz?icos, e ? imunofluoresc?ncia, estruturas esverdeadas em forma de banana. Nos raspados de mucosa corados pelo Giemsa, as formas intestinais do parasito foram caracterizadas por merontes, merozo?tas, macrogamet?citos e microgamet?citos