Coccidia (Protozoa: Eimeriidae) of Swine

Vetterling, John M.

doi:10.2307/3275867

Cited by 39 publications

(22 citation statements)

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“…The extensive morphological data generated in the present study are generally in accordance with previous reports (Vetterling, 1965;Rommel, 1970;Pellerdy, 1974;Lo¨wenstein and Kutzer, 1989), however, some discrepancies were also obvious. For instance, the oocysts of E. polita, which were found in all Eimeria-positive specimens, tended to be smaller than that described by Rommel (1970) and Pellerdy (1974).…”

Section: Discussionsupporting

confidence: 89%

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Prevalence of Eimeria spp. in Sows at Piglet‐producing Farms in Germany

Daugschies

Imarom

Ganter³

et al. 2004

Journal of Veterinary Medicine, Series B

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Summary The prevalence of Eimeria infections was investigated in an initial survey in 54 sow herds of small (five sows) to large (1600 sows) size by random sampling (n = 1204). All sows of four Eimeria‐positive medium‐sized farms (63 or 130 sows) were re‐examined 40–99 days after the first visit. A follow‐up survey over the whole reproductive cycle was subsequently performed in a positive herd of 130 animals where faecal samples of 43 sows were repeatedly collected on seven successive farm visits. In 44 farms (81.5%) parasite stages (eggs of strongylids, Trichuris, Ascaris, Strongyloides, oocysts of Eimeria and Isospora) were identified in sow faeces, strongylids being the most prevalent intestinal parasites (34 farms resembling 63%) followed by Eimeria spp. (28 farms resembling 52%). Of the 1204 random samples collected during the initial survey 8.6% contained Eimeria oocysts. Oocysts of E. polita and E. debliecki were present in each of 25 Eimeria‐positive samples selected for species differentiation. Eimeria suis was diagnosed in 84%, E. scabra in 60%, E. porci in 52%, E. perminuta in 49% and E. spinosa in 20% of these specimens. At the second visit the prevalence rates of Eimeria infections had either increased or decreased. In the follow‐up study Eimeria infections were found to be most frequent (82%) at the service station. At the quarantine unit and the gestation stable 50 and 48% of the 43 sows were Eimeria positive. The lowest prevalence of Eimeria infection was observed in the farrowing unit (14%). With respect to the reproductive state of the sows highest infection rates were seen 2 weeks after weaning (72%) continuously decreasing until 2 weeks after farrowing (14%). A periparturient rise of oocyst excretion was not observed. The infestation rate remained low until 1 week before weaning (16%). Low infection intensities clearly dominated. Clinical disease was not associated with Eimeria infection.

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Section: Discussionsupporting

confidence: 89%

“…However, the species composition in cases of porcine Eimeria infection may vary regionally or depend on the population studied. For instance, according to Vetterling (1965) E. neodebliecki was the most prevalent species in swine in the United States whereas we could not identify this species in any of our samples. However, E. polita (syn.…”

Section: Discussioncontrasting

confidence: 78%

Prevalence of Eimeria spp. in Sows at Piglet‐producing Farms in Germany

Daugschies

Imarom

Ganter³

et al. 2004

Journal of Veterinary Medicine, Series B

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“…1: Isospora suis oocyst production, per day, in four pigs experimentally infected, during the period of 21 days after inoculation. time faecal examination was carried out (Biester & Murray 1934, Vetterling 1965, Lindsay et al 1980. In the present study, thin wall oocysts were also found in faecal samples submitted to floatation in sucrose or sodium chloride solutions for a short time.…”

Section: Resultssupporting

confidence: 59%

Experimental Infection of Swine by Isospora suis Biester 1934 for Species Confirmation

Sayd¹,

Kawazoe

1998

Mem. Inst. Oswaldo Cruz

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Key words: Isospora suis -life cycle -neonatal isosporosis -pathogenicityIsospora suis has been considered an important enteroparasite of piglets which causes coccidiosis in neonatal swine (Ruzicka & Andrews 1983). Yellowish-pasty diarrhoea is the most characteristic clinical sign of the disease which is more prevalent in piglets between 5 to 21 days old. It does not respond to any antibiotic treatment (Lindsay 1989) but experiments with an anticoccidial drug toltrazuril have been successfully used experimentally (Mundt 1994) as well as in some swine farms (Kondela et al. 1991, ByeungGie 1995 pressures of oocysts by the time of faecal examination. Life cycle and oocyst structure of Sarcocystis species were unknown at the time of their articles publication.In the present study an experimental infection of thin wall type oocysts was performed in piglets for the confirmation of I. suis species characterized by clinical signs, possible small intestine tissue lesions, oocyst structure and life cycle observations. MATERIALS AND METHODSThin wall oocysts were isolated from four faecal samples collected in swine farms and cultivated according to the method described by Long et al. (1976) with some modifications. Faecal samples were filtered through a metalic sieve of 50 meshes, centrifuged in 800 g for 5 min to obtain the pellet and cultivated in 2% potassium dichromate solution with oxygen aeration at room temperature of about 25 o C during at least 72 hr. This type of oocysts was inoculated in four-five-day-old pigs free of contamination: pig 1 received 6.6 x 10 4 sporulated oocysts, pig 2 received 10 3 oocysts, and pigs 3 and 4 received 4 x 10 4 oocysts.They were kept in individual metal cages and fed with cow milk. Daily observations of pigs for dehydration level, general conditions, faecal consistency and oocyst production were performed until the 21st day after inoculation. MacMaster and Sheather' s methods were used for oocyst identifi-

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“…They concern primarily taxonomy [23], experimental infections (1, 5, 18, 19, 221, surveys to determine prevalence [6, 7, 251, and descriptions of endogenous forms and life cycles [8, 19, 24,261. Although coccidia are common in swine throughout the United States (251, enteritis associated with coccidial infections is reported infrequently.…”

mentioning

confidence: 99%

Lesions Associated with Coccidiosis in Nursing Piglets

Eustis

Nelson

1981

Vet Pathol

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Abstract. Of 45 piglets with diarrhea, 28 had coccidiosis, with no evidence of concurrent viral infection. Villous atrophy and necrotic enteritis were the characteristic lesions, and were more severe in piglets with combined viral and coccidial infections than with coccidiosis alone. Necrotic enteritis presumably was caused by bacterial invasion of the villous lamina propria at foci denuded of epithelium by coccidia, viruses or both. Consistent lesions associated with coccidia in piglets not infected by other primary enteric pathogens suggest that coccidia are the cause of significant clinical disease in nursing piglets 6 to 15 days old.

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Coccidia (Protozoa: Eimeriidae) of Swine

Cited by 39 publications

References 0 publications

Prevalence of Eimeria spp. in Sows at Piglet‐producing Farms in Germany

Prevalence of Eimeria spp. in Sows at Piglet‐producing Farms in Germany

Experimental Infection of Swine by Isospora suis Biester 1934 for Species Confirmation

Lesions Associated with Coccidiosis in Nursing Piglets

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