All issues
Volume 43, Issue 9
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
TADASHI HIRAHARA, HISAO YASUHARA, AKIHIRO IZUMIDA, KENICHI YOSHIKI, HI ...1990 Volume 43 Issue 9 Pages 639-645
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA survey was conducted on diseases of fattening pigs on two large auto-breeding farms in Koshinetsu and Tohoku districts from 1983 to 1984.
Many of piglets on the two farms (9.5% and 15.1%) showed slight diarrhea at one month of age, and rotavirus and Escherichia coli were thought to be the cause of piglet diarrhea by isolation of agents and serological survey. The pigs mainly began to show respiratory signs such as coughing, nasal discharge, eye patch and anorexia after two months of age.
Autopsy of dead or dying pigs revealed pleuropneumonia, mycoplasmal pneumonia, and enteritis.
The mortality rates of baby pigs on the two farms were 7.9% and 4.0%, respectively. On the other hand, the mortality rates of the fattening pigs were very low (2.3% and 1.8%) after two months of age.
Many pathogenic agents, such as porcine enterovirus, parvovirus, porcine hemagglutinating encephalomyelitis (PHE) virus, reovirus, Bordetella (B.) bronchiseptica, Actinomyces pyogenes, Pasteurella multocida, Actinobacillus (A.) pleuropneumoniae and mycoplasma were isolated from their respiratory tract, and Escherichia coli was isolated from diarrheal feces of infected pigs.
The antibody titers of the fattening pigs against influenza virus, adenovirus, PHE virus, reovirus, rotavirus, A. pleuropneumoniae and B. bronchiseptica increased they became 2 or 3 months.
Based on these observations, it was suggested that most of diarrheal and respiratory diseases of piglets on the auto-breeding farms may be caused by mixed infection with several viruses and bacterial agents. The present survey also proved that the mortality rate of piglets over two months old on the auto-breeding farms was extremely lower than that on farms raising piglets bringing in from other breeders, indicating the advantage of the former over the latter.View full abstractDownload PDF (3880K) -
AKIHIRO IZUMIDA, HISAO YASUHARA, MICHIO KUBOTA, KENICHI YOSHIKI, TADAS ...1990 Volume 43 Issue 9 Pages 646-649
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe distribution of antibody against each of Getah, Japanese encephalitis (JE), Apoi, Akabane, Batai, Ibaraki and bovine ephemeral fever (BEF) viruses among pigs in Japan was examined by hemagglutinationinhibition (HI) test or serum neutralization test. During the period of 1979 to 1984, sera from 340 pigs, living through the summer, were collected throughout the country except in the Kyushu district. The positive rate to JE virus was much higher than that of the other viruses and the positive sera to JE virus were detected in every district. A positive rate of 46.2% was found to Getah virus, especially in the Kinki and Chugoku-Shikoku districts, relatively high positive incidences were demonstrated but no positive serum was found in Hokkaido. HI antibodies against Apoi virus detected in this study seemed to be derived from the cross-reactions with antibodies against the JE virus. Although, a low positive rate to each Batai, Akabane and Ibaraki viruses was found, no positive sera to the BEF virus were detected.View full abstractDownload PDF (603K) -
KEIJI OKADA, SHIGERU SATO, TOSHIYUKI SUZUKI, YOSHIHIRO KANEDA1990 Volume 43 Issue 9 Pages 650-654
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe relationships between progesterone levels in skim milk and collection methods of samples were investigated. The progesterone levels in skim milk differed significantly from quarters and from collection times. The differences of mean progesterone concentration in intra-quarters were from 0.4 ng/ml to 1.7 ng/ml at various collection times. Progesterone levels of before milk were significantly lower than those of bowl milk at morning milking in 4 cows, their plasma progesterone levels were over 5.0 ng/ml. Although there were no significant differences between bowl milk, before milk and after milk in 6 cows, their plasma progesterone levels were under 5 ng/ml. Progesterone levels in skim milk collected 4 hrs and 6 hrs after morning milking were significantly lower than those of bowl milk. Progesterone levels of skim milk were significantly lower than those of plasma, but positive correlation was recognized between both levels, except milk collected 6 hrs after milking.View full abstractDownload PDF (731K) -
KENNJI UNO, KAZUKI TAKESUE, KOJI NAKANISI, KYOKO NAKAGAWA, KENJI MURAK ...1990 Volume 43 Issue 9 Pages 655-660
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSFive calves, 17 to 160 days of age, suggesting immunodeficiency was encountered in Shiga Prefecture from July to November in 1987. Clinically, the animals showed weakness immediately after birth and suffered from chronic diseases manifesting as recurrent diarrhea or pneumonia. Grossly, a remarkable atrophy of the thymus and lymphoid tissues in the lymphatic organs was common in all 5 calves. Various forms of bronchopneumonia in the lungs of 4 calves and purulent meningitis in one calf were detected histopathologically as a main lesion. Bacteriologically, Pasteurella multocida, Actinomyces-like organism, and Bacillus subtilis were significantly isolated from the pulmonary lesions. The isolation of Gram-negative rods from the brain affected with purulent meningitis was also significant and Aspergillus sp. was recognized immunohistochemically in granulomatous pneumoni lesions. Most of these microorganisms were well known to be comparatively low pathogenic. Therefore, the immunodeficiency, which was suggested by atrophic changes in the thymus and lymphatic organs, may be closely related to the development of infections with these microorganisms. These thymuses examined, provided with the differentiation of the cortex and medulla, the presence of Hassall's corpuscles and the increase of inter-lobular connective tissues were considered to be different from those of congenital hypoplasia. In order to clarify the causes of themic atrophy, however, further studies are needed.View full abstractDownload PDF (8491K) -
HIROKAZU ITO, SHOJI OKADA, SHOJI KOBAYASHI, HIROYUKI SUGIYAMA, MASANOR ...1990 Volume 43 Issue 9 Pages 661-665
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA total of 906 Japanese quails in 127 flocks were examined during the 10 year period from 1979 to 1988 in Higashimikawa district, with 57 quails in 18 flocks being diagnosed as colibacillosis. Colibacillosis occurred in 14 flocks from January to May, affecting quails aged 21 to 330 days. Autopsy reveald hepatomegaly and thickening of the liver capsule and pericardium. Histological examination revealed necrosis of hepatocytes and fibrinous pericarditis. Bacteriologically, numerous Escherichia coli were isolated in a pure state from the livers and hearts. E. coli isolated was susceptible to drugs, such as CER, GM, CP, NA and OA, but resistant to PC, OTC and SDM.View full abstractDownload PDF (4069K) -
MASAHIKO KUME1990 Volume 43 Issue 9 Pages 666-669
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA total of 35 Corriedale newborn lambs (16 males and 19 females) were used to determine the estimation index for the length of the nourishment catheter. Lambs that died within 3 days after birth without pathological and physiological abnormality in their viscera were used for the determination. Every lamb was measured in distance from the muzzle to theOstium cardiacumand diagonally in body length from the shoulder tip to the pin-bone end. The distance from the muzzle to theOstium cardiacumwas expressed as the esophageal length in the present study. Results obtained from individual lambs revealed coefficients of variation with less than 10% for the esophageal and the diagonal body length. The esophageal length significantly correlated with the diagonal body length. When the esophageal length (EL, cm) regressed on the diagonal body length (DBL, cm), the following regression equation was obtained: EL =0.85DBL+4.9, γ=0.924, s.e.±0.17. The coefficient of determination (0.86) showed that the equation speculated well the estimation of the esophageal length by the diagonal body length. The ratio of the esophageal length averaged 1.01±0.03 to the diagonal body length. It is concluded that the esophageal length is accurately estimated by the regression equation, but proximate estimation may be determined as the diagonal body length in an emergency.View full abstractDownload PDF (512K) -
TETSUYA SHIMODA, KOUSUKE NORO1990 Volume 43 Issue 9 Pages 673-676
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA total of 134 cats with clinical signs of feline leukemia virus infection were investigated. The mean age for all cats was 3.1 years, ranging from 3 months to 18 years. Males represented 68% of all cases.
Only 22 cases (16%) were classified as neoplastic disease with the majority (84%) classified as nonneoplastic disease. Many of the non-neoplastic diseases were seen unrelated to the FeLV infection itself, but FeLV-related immunosuppression was suspected as the etiology.
Prognosis of these cases varied with the nature of the disease. A 51% mortality was noted within 1 year after diagnosis, with an approximate 50% death rate occurring within 1 month.View full abstractDownload PDF (698K) -
KAZUHARU KAWASHIMA, MICHIAKI SUGAYA, YASUJI KATSUBE, SOICHI MARUYAMA, ...1990 Volume 43 Issue 9 Pages 679-681
Published: September 20, 1990
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA total of 194 cats derived from Kanagawa Prefecture was examined for Salmonella during the summers in 1983 and 1984. Eleven cats (5.7%) harbored Salmonella in the mesenteric lymph node and/or intestinal mucosa harvested from the surrounding part of the Ostium ileocaecocolicum. Among the 7 serovars isolated, S. choleraesuis subsp. choleraesuis serovar typhimurium was found to be the most predominant one.View full abstractDownload PDF (690K)
- |<
- <
- 1
- >
- >|