PubMed Health⌕ Search

Biomedical subjects

J R Turk

Publications and source records attributed to J R Turk.

At least 55 records · Page 3Linked to original sources
PubMed1993

Effects of feeding Fusarium moniliforme culture material, containing known levels of fumonisin B1, on the young broiler chick.

The effects of feeding Fusarium moniliforme culture material, containing known concentrations of fumonisin B1 (FB1), were studied in broiler chicks. Day-old chicks were allotted randomly to dietary treatments containing 0, 1.02, 2.04, 3.06, 4.08, 5.10, 6.12, and 7.14% fumonisin culture material (FCM). These levels of FCM supplied 0, 75, 150, 225, 300, 375, 450, and 525 mg of FB1/kg of feed. Each dietary treatment was fed to four pen replicates of six birds each for 21 days. Chicks fed FCM that supplied 450 and 525 mg FB1/kg diet had lower (P < .05) feed intakes and BW gains; increased (P < .05) liver and kidney weights; and increased (P < .05) mean cell hemoglobin, and mean cell hemoglobin concentrations. Compared with controls, chicks fed FCM had increased (P < .05) free sphinganine levels and sphinganine:sphingosine ratios. Treatment-associated histological lesions were only observed in the liver of chicks fed diets containing FCM that supplied 225 mg FB1/kg or higher. Diets containing FCM that supplied levels as low as 75 mg FB1/kg affected the physiology of chicks by increasing free sphinganine levels and sphinganine:sphingosine ratios. Because inhibition of sphingolipid biosynthesis has been hypothesized as the mechanism of action of FB1, this suggests that diets containing 75 mg FB1/kg FCM may be toxic to young broiler chicks.

Animal Feed↗
PubMed1992

Pneumonia associated with Salmonella choleraesuis infection in swine: 99 cases (1987-1990).

Salmonella choleraesuis was isolated in pure or mixed bacterial cultures from 153 swine necropsied between Jan 1, 1987 and Dec 31, 1990. Pneumonia was seen in 99 of 109 swine from which this bacterium was isolated in the absence of other pathogenic bacteria. Pneumonia was seen more frequently than hepatitis, splenomegaly, or colitis. Pleuropneumonia that was grossly indistinguishable from the pleuropneumonia associated with Actinobacillus pleuropneumoniae was seen in 29 of 99 swine from which S choleraesuis was the only bacterium isolated.

Animals↗
PubMed1991

Cutaneous neoplasia in 340 cats.

A total of 340 cases of cutaneous neoplasia were diagnosed in 340 of 3,564 cats that were examined by biopsy or necropsy during a 41-month period from January 1, 1986 through May 31, 1989. Eighteen types of tumor occurred, but four types comprised 77% of the cases. These were basal cell tumor, 89 cases (26%, mean age 10.3); mast cell tumor, 72 cases (21%, mean age 8.6); squamous cell carcinoma, 52 cases (15%, mean age 11.6); and fibrosarcoma, 50 cases (15%, mean age 10.2). For each of these four types of tumors, peak number of cases occurred in cats older than 10 years. Mast cell tumor was the only tumor diagnosed in cats younger than 1 year. The head was the most common site for basal cell tumors, mast cell tumors, and squamous cell carcinomas. The legs were the most common location of fibrosarcomas. Siamese cats had approximately three times as many mast cell tumors as statistically expected, but only one-fourth as many squamous cell carcinomas. Breed predilection for other skin tumors was not apparent. Sex predilection was not detected for any skin tumor.

Animals↗
PubMed1990

Chlamydial infection in aborted and stillborn lambs.

Chlamydia psittaci is a major cause of ovine abortion in the fourth to fifth months of gestation. During the lambing seasons of 1986, 1987, and 1988, fetuses from 52 cases of ovine abortion, stillbirth, or perinatal death were submitted to the laboratory for necropsy examination. Placenta or fetal tissues from 34 cases were cultured on mouse L cells for C. psittaci. Chlamydia psittaci was identified by immunofluorescence on cultures in 20 of these cases. The major gross lesion consistently associated with chlamydial abortion was placentitis with multifocal cotyledonary necrosis and accumulation of red-brown exudate in the intercotyledonary placenta. Chlamydiae appeared as spherical organisms, less than 1 micron in diameter, in the cytoplasm of trophoblasts in impression smears of cotyledons. Histologically, placentitis was sometimes accompanied by pneumonia or encephalitis in the fetus. Chlamydia psittaci was considered the cause for fetal death when chlamydial isolation was associated with placentitis or inflammation of other fetal tissues and when other abortifacient agents were not detected.

Abortion, Veterinary↗
PubMed1989

Antimicrobial susceptibility and serotypes of Actinobacillus (Haemophilus) pleuropneumoniae recovered from Missouri swine.

The antimicrobial susceptibility of 73 Actinobacillus (Haemophilus) pleuropneumoniae isolates from swine in Missouri was determined with a microdilution minimal inhibitory concentration test system. Serotyping was accomplished by means of co-agglutination. Serotype 1 (39/73) and serotype 5 (30/73) were commonly found, whereas serotype 7 (4/73) was infrequently encountered. Most isolates (MIC90) were found susceptible to ampicillin (amoxicillin), cephalothin, penicillin, erythromycin, gentamicin, and kanamycin. Marked resistance was found with oxytetracycline, tylosin, and sulfadimethoxine. The data indicate that use of ampicillin (amoxicillin) or penicillin may correlate well with the favorable outcome of treatment.

Animals↗
PubMed1988

Survival of a dog with pneumonia caused by Mycobacterium fortuitum.

Pneumonia caused by Mycobacterium fortuitum was diagnosed in the left lung lobes of a 3-year-old male Samoyed. Unilateral pneumonectomy and antibiotic treatment (primarily amoxicillin trihydrate-clavulanate potassium and kanamycin) were associated with resolution of the pneumonia. In dogs, M fortuitum causes pulmonary disease that radiographically resembles bacterial pneumonia. Therefore, M fortuitum infection should be considered in dogs with radiographic signs of bronchopneumonia that worsen despite antibiotic treatment.

Animals↗
PubMed1987

Effects of heartworm and intestinal parasitic infections on hematology and peripheral lymph node cytology in louisiana dogs.

Hookworm infected dogs had higher blood basophil counts than hookworm negative dogs. Dogs with occult heartworm infection (i.e., without microfilaremia) had higher blood neutrophil counts than heartworm negative dogs. The percentage of eosinophils in peripheral lymph nodes was higher in heartworm infected, microfilaremic dogs than in both occult infected dogs and heartworm negative dogs. Heartworm or intestinal parasitic infection had no other significant effects on hematologic parameters or peripheral lymph node cytology.

Journal Article↗
PubMed1984

Unexpected death in an adult dog with anomalous origin of the left coronary artery from the pulmonary trunk.

A two-year-old female miniature poodle died unexpectedly while romping with its owner. Anomalous origin of the left coronary artery from the left pulmonic sinus was discovered at necropsy. Histologically, the right ventricle was unremarkable, but multifocal to coalescing necrosis and fibrosis occurred in the myocardium and endocardium of the left ventricle. Medial hypertrophy of small muscular pulmonary arteries was observed in the lung. The cardiac lesions were similar to those of children with anomalous origin of the left coronary artery from the pulmonary trunk. Pulmonary hypertension, which is suggested by the pulmonary arterial medial hypertrophy, could have increased left ventricular myocardial perfusion and delayed the ischemic myocardial damage that resulted in the death of this dog.

Animals↗
PubMed1981

A canine testicular tumor resembling gonadoblastoma.

A tumor of the left testicle resembling a gonadoblastoma was an incidental finding at necropsy in a 15-year-old male Shetland Sheepdog. This neoplasm was characterized by discrete intratubular aggregates of intimately mixed germ cells and smaller cells resembling Sertoli cells. The latter small cells often formed a single cell layer surrounding the margin of eosinophilic, PAS-positive Call-Exner-like bodies. Electron microscopy showed these bodies to be composed of whorled laminae resembling basement membrane.

Animals↗