ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04317.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04318.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04319.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04320.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04321.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04322.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryPrevalence and infection patterns ofCryptosporidiumandGiardiainfections in horses were studied by a direct immunofluorescence staining method. Faecal examinations of 222 horses of different age groups revealedCryptosporidiuminfection rates of 15–31% in 66 foals surveyed in central Ohio, southern Ohio and central Kentucky, USA. Only 1 of 39 weanlings, 0 of 46 yearlings, and 0 of 71 mares were positive.Giardiainfection was found in all age groups, although the infection rates for foals were higher (17–35%). Chronological study of infection in 35 foals showed that foals started to excreteCryptosporidiumoocysts between 4 and 19 weeks andGiardiacysts between 2 and 22 weeks of age. The cumulative infection rates ofCryptosporidiumandGiardiain foals were each 71%. Some foals were concurrently infected with both parasites and excretion of oocysts or cysts was intermittent and long‐lasting. The longest duration of excretion was 14 weeks forCryptosporidiumand 16 weeks forGiardia.Excretion ofCryptosporidiumoocysts stopped before weaning, while excretion ofGiardiacysts continued thereafter.Infected foals were considered the major source ofCryptosporidiuminfection in foals, whereas infected mares were deemed the major source ofGiardiainfection in foals. The high infection rate ofGiardiain nursing mares suggested a periparturient relaxation of immunity. The results indicated thatCryptosporidiumandGiardiainfections are common in h

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04323.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryA retrospective study of 75 cases of pedunculated lipoma obstruction (PLO) of the intestine was conducted. Age, breed and sex distributions were compared to the non‐PLO colic population. Horses in the PLO group were significantly older than in the non‐PLO colic group (P<0.001). A significant increase in risk of PLO was associated with geldings (O.R. 2.32) and with ponies (O.R. 3.75). Of the 75 PLO cases analysed, 69 were strangulating, 70 involved small intestine and 5 involved small colon. Cases of strangulation obstruction tended to have lipomas originating distant to the mesenteric border of the intestine. The short‐term survival rate for PLO cases was 48%. Long‐term survival rate was 38%. Lipoma weight of some of the PLO group was compared with that from an asymptomatic pedunculated lipoma (APL) group. The two weight distributions were significantly different (P

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04324.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryWelsh Mountain ponies were inoculated with an isolate ofStreptococcus pneumoniae, SPE 1618 (capsular type 3) recovered from the equine respiratory tract: 10 ml of a suspension of 108or 109cfu/ml were instilled intratracheally. Fever was observed after either dose but the greater concentration also produced coughing, ocular and nasal discharge, depression and enlargement of submandibular lymph nodes. Cytological evidence of infection was also observed in tracheal washings during the first week after inoculation and corresponded with isolation ofS. pneumoniaefrom the washes. Morbid anatomical and histopathological examinations of selected animals revealed focal pneumonia affecting the ventral lung, especially the cardiac area and accessory lobe, with a propensity to affect the right lung.S. pneumoniaewas isolated directly in pure culture from these lesions or was demonstrable by immunostaining of macrophages bearing specific capsular type 3 antigen. By 10 days after inoculation, the ponies were healthy and had developed antibodies toS. pneumoniae. S. pneumoniaewas therefore a primary pathogen in the horse under the conditions of the challenge.

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04325.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SummaryCyanogen bromide was used to solubilise and specifically fragment purified equine Type I and II collagen and equine articular surface repair tissue. The resultant peptides were separated by sodium dodecyl sulphate‐polyacrylamide gel electrophoresis and quantified by densitometric scanning. Measurement of the relative amounts of the peptides α2(I) CB3, 5 and α1(II)CB10 provided an accurate method of establishing the ratio of Type I to Type II collagen in mixtures of purified equine collagens. The method was sensitive to 6% Type II collagen when the band areas were corrected for peptide molecular weight and the number of chains in the parent tropocollagen molecule which contain that particular peptide. Use of this technique showed that repair tissue in full thickness osteochondral defects in the dorsodistal margins of the intermediate carpal bones of ponies did not contain detectable amounts of Type II collagen 11 weeks after defect induct

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1994.tb04326.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY