Infestation in the dog by the paralysis tick Ixodes holocyclus 3. Respiratory effects     

J. E. ILKIW  D. M. TURNER 《Australian veterinary journal》1987,64(5):142-144

To assess respiratory function in dogs with tick paralysis, respiratory measurements were recorded on 14 dogs experimentally infested with Ixodes holocyclus. There was a progressive fall in respiratory rate with no change in tidal volume, which resulted in a significant fall in minute respiratory volume in the latter stages of the disease. The fall in respiratory rate was possibly central in origin and was accompanied by an increased alveolar-arterial oxygen tension difference, probably caused by pulmonary congestion and oedema. The "grunting" respiration seen in tick paralysis was due to closure of the vocal cords during expiration and could represent an attempt to re-expand collapsed parts of the lung.  相似文献   

Federal and trade deficits     

Abelson PH 《Science (New York, N.Y.)》1987,238(4831):1211

  相似文献   

Materials research     

Abelson PH 《Science (New York, N.Y.)》1987,235(4784):9

  相似文献   

Managing technology     

Abelson PH 《Science (New York, N.Y.)》1987,235(4786):265

  相似文献   

The enigma of zinc     

Dewes HF  Lowe MD 《New Zealand veterinary journal》1987,35(1-2):16-17

  相似文献   

Recovery of Mycoplasma spp. from the Reproductive Tract of the Mare during the Estrous Cycle          下载免费PDF全文

Bermudez V  Miller R  Johnson W  Rosendal S  Ruhnke L 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):519-522

The sites in the genital tract from which mycoplasmas could be recovered at various stages of the estrous cycle were studied in five Standardbred mares naturally infected with Mycoplasma. Mycoplasma equigenitalium and Mycoplasma subdolum were most frequently isolated from the clitoral fossa as compared to the vagina, cervix, and uterus. The lowest isolation prevalence was observed in the uterus. The recovery of Mycoplasma spp. from the clitoral fossa did not differ at any stage of the estrous cycle; however, recovery from the vagina, cervix, and uterus was variable during the cycle and more organisms were recovered on the day of ovulation than at any other time. From these results it was concluded that the clitoral fossa is the most likely “ecological niche” for Mycoplasma spp. in the mare. Ureaplasmas were not isolated.  相似文献   

Canada's Experience with Foot-and-Mouth Disease          下载免费PDF全文

Krystynak RH 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):540-542

  相似文献   

Interrelationships among Production and Clinical Disease in Dairy Cattle: A Review   总被引：1，自引：0，他引：1       下载免费PDF全文

Erb HN 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(6):326-329

Epidemiological evidence is presented in order to answer two questions. The first question is: “Does high milk production put a cow at increased risk of disease?” The answer to this question seems to be “maybe” for milk fever, but “no” for most other common diseases (veterinary-assisted dystocia, retained placenta, metritis, cystic ovary, ketosis, left displaced abomasum, and mastitis). The second question is: “Is low milk production a consequence of disease?” For most diseases the answer is a cautious “yes”.  相似文献   

The ability of biochemical and haematological tests to predict recovery in periparturient recumbent cows     

Clark RG  Henderson HV  Hoggard GK  Ellison RS  Young BJ 《New Zealand veterinary journal》1987,35(8):126-133

Blood samples from 433 periparturient recumbent cows submitted by veterinary practitioners to Ruakura Animal Health Laboratory during 1983 and 1984 were analysed and results related to whether cows recovered, died or were euthanased. Generally cows were sampled only once and the time varied from 15 minutes to 20 days after becoming recumbent. During 1983 serum calcium, magnesium, phosphorus, creatine phosphokinase (CK), aspartate amino transferase (AST), glutamate dehydrogenase (GDH), gamma glutamyl transferase (GGT) were analysed. In 1984 serum urea, creatinine, fibrinogen and haematological examination (haemoglobin, haematocrit, total and differential white cell counts) were added to the panel. Overall 39% of cows recovered, 30% died and 32% were destroyed. Precalving cows had 111% more deaths and 7% less survivors than postcalving recumbent cows (P<0.1). There was little difference (3%) in euthanasia prevalence. Tests that were most useful in predicting a lack of recovery were serum urea and muscle enzymes. Using these tests and duration of recumbency when sampled a model was produced to predict the probability of recovery from 254 cases.  相似文献   

Suspected selenium poisoning in a horse     

Dewes HF  Lowe MD 《New Zealand veterinary journal》1987,35(4):53-54

A case of selenium poisoning was suspected following the administration of 325 micromol selenium a day as sodium selenate (25 mg Se) for five consecutive days. The main signs were confined to changes in the integument which were loss of hair from the mane and tail, disintegration of the skin of the anus, lips, prepuce and scrotum, and separation of the hooves from the coronary corium. Periodic analyses of blood, hair and hoof parings from the sole correlated strongly with blood and identified horn and hair as important additional routes of excretion.  相似文献