摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34354

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34355

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Twelve New Zealand isolates of avian Infectious Bronchitis virus were typed by the serum-neutralization test. Both the constant serum decreasing virus and the constant virus decreasing serum methods were used. Cross-protection tests in specific-pathogen-free chickens were also carried out.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34356

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The properties of four serotypes of New Zealand Infectious Bronchitis (IB) virus in the 10th and the 40th to 50th egg passage were investigated. All viruses were chloro-form-sensitive. Three types in the 10th egg passage were inactivated by heating to 56°C within 10 minutes, the fourth one within 30 minutes. The growth curve of all viruses at a low and a high passage level has been determined.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34357

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

In a field trial the efficacy of a New Zealand Infectious Bronchitis (IB) vaccine in the forty-seventh egg passage was evaluated. The vaccine, administeredviathe drinking water, had only a very mild residual pathogenicity for IB susceptible andMycoplasma gallisepticum-free birds. Immunity was challenged three weeks after vaccination by intratracheal inoculation with four different New Zealand types of IB virus. All groups of vaccinated chickens showed much less severe clinical and histological signs of respiratory disease than control chickens, and challenge virus was re-isolated from a lower number of the vaccinated birds. These results indicate that the vaccine effectively immunized the birds against all four challenge viruses.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34358

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A study was made of the epidemiology ofLeptospira interrogansserotypepomonainfection in an intensively housed herd of pigs. Diagnosis of infection was based on serological examinations. Blood samples were collected from groups of pigs at various intervals from birth until slaughter (six or seven months of age). Infection was confined to one of four buildings in which pigs were housed during this time. The movement of pigs between pens and the effluent drainage arrangements were factors responsible for infection becoming endemic in this building.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34359

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Dermatophytes were isolated from 38 of the 199 cats examined. There were 13 isolates ofMicrosporum canis, five isolates each ofM. cookeiandTrichophyton ajelloiand 15 isolates ofT. terrestre. There were 11 isolates of the genusChrysosporium, one of which proved to beAphanoascus fulvescens. The need to distinguish between various dermatophyte species is emphasized, particularly those species that may occur as contaminants in clinical specimens.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34360

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Cambendazole paste 31% w/w, at 20 and 40 mg/kg, was tested in a series of field trials involving 237 horses of various ages, sex and pregnancy status. No drug-related sequelae were observed except for a mild anorexia in 10 thoroughbreds in training and on concentrate feed. Forty-nine thoroughbred mares, more than three months pregnant, showed no drug-related sequelae to themselves or their foals. Of 10 dosed at 80 or 160 mg/kg, one (80 mg/kg) showed elevated temperature at % hours after dosing.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34361

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The incidence of bruising on the lateral stifle region was assessed in 16,400 young calves slaughtered during one week at an Auckland abattoir. Fifty percent of calves slaughtered had bruised stifles and in 30% this was the only bruised region of the carcass.

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34362

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0048-0169    

DOI:10.1080/00480169.1977.34363

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor