OPAP--a new approach to the management of obstructive sleep apnea.
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Airway Resistance↗
Biomedical subjects
R W Moore
Publications and source records attributed to R W Moore.
Dengue fever risk and prevention for short-term group travelers to tropical regions.
The purpose of this study is to describe dengue fever infections in a group traveling from northern Louisiana to Mexico. Of 50 travelers in the group, three adolescents aged 15-16 developed febrile symptoms a few days after returning. Clinical diagnosis suggested dengue fever. Serum samples were obtained from the three adolescents and from 19 of the adults (age 18 and older) who were in the group. The samples were analyzed by the Centers for Disease Control using dengue IgM capture enzyme linked immunosorbant assay. Results confirmed the three symptomatic adolescents and five asymptomatic adults had been infected with the Flaviviridae virus that causes dengue. We conclude that since there is no vaccine to prevent dengue infections, travelers to high-risk areas should take steps to prevent infection and that clinicians encountering patients with febrile illnesses after travel to such regions should consider a diagnosis of dengue fever.
Adolescent↗
Evaluation of alternative sampling methods for Salmonella critical control point determination at broiler processing.
Several sampling methods have been developed for the detection of Salmonella on broiler carcasses during commercial processing. The present study evaluated three sampling methodologies for sensitivity of Salmonella detection on processed broiler carcasses. Furthermore, the effect of crop removal or chill tank exposure on the frequency of Salmonella recovery was also examined. In two experiments, swab, skin, and carcass rinse samples were compared for sensitivity of Salmonella detection. The results indicated that culture of swabs was less effective (P < 0.05) for Salmonella detection than either skin or carcass rinse samples. No significant (P > 0.05) differences were observed in Salmonella recovery from culture of skin or carcass rinse. In two subsequent experiments, skin and carcass rinse samples were found to be equally sensitive in their ability to detect Salmonella. Additionally, the stages of processing between feather and crop removal were observed to cause significant (P < 0.05) increases in Salmonella recovery within an individual flock. Similar increases (P < 0.05) in Salmonella recovery were also observed following crop removal and immediately following immersion chilling in two separate flocks. These results suggest that culture of skin samples obtained from the thoracic inlet region may be a viable alternative to the traditional whole carcass rinse method for sensitivity of Salmonella detection. Furthermore, these experiments provided some evidence that the majority of Salmonella cross-contamination of carcasses prior to immersion chilling occurred following evisceration, with the chill tank potentially providing a major site for cross-contamination between Salmonella-negative and-positive flocks.
Animals↗
Comparison of enrichment methods for recovery and chick infectivity of chlorine-injured Salmonella enteritidis.
In recent years, several preenrichment media have been shown to be effective for use in the recovery of sublethally injured Salmonella organisms. Selective enrichment without preenrichment has resulted in a lower recovery of organisms, particularly with regard to injured or stressed salmonellae. The present experiments compared the ability of nonselective preenrichment followed by selective enrichment or direct selective enrichment alone to recover chlorine-injured Salmonella organisms. Additionally, the Salmonella detection limits of the two enrichment methods were compared with minimal infectious dose in neonatal chicks. In three experiments, Salmonella enteritidis cells were exposed to chlorine for specific times and subsequently cultured by using preenrichment followed by selective enrichment or selective enrichment alone. Simultaneously, neonatal chicks were orally challenged with S. enteritidis cells from each exposure time to chlorine. The results indicated a marginal, but significantly (P < 0.05) higher level of recovery of sublethally injured salmonellae by using nonselective preenrichment followed by selective enrichment, as compared to selective enrichment alone. Interestingly, both culture methods were capable of detecting injured S. enteritidis cells at levels incapable of infecting neonatal chicks.
Animals↗
Induction of PGH synthase and c-fos mRNA during early reperfusion of ischemic rat brain.
We examined the effect of reversible ischemia on the transcription of prostaglandin endoperoxide synthase (PGHS-1) and c-fos mRNA in rat cerebral cortex. The level of PGHS-1 mRNA climaxed after 30 min of ischemia whereas transcription of c-fos mRNA peaked after 60 min of postischemic reperfusion. We conclude that cerebral ischemia causes early transcription of PGHS-1, without modulation by the c-fos gene or its translated product.
Animals↗
Acute and subacute rehabilitation.
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Acute Disease↗
Spontaneous gestures following right hemisphere infarct.
Neurobehavioral studies of gesturing have been largely limited to left hemisphere damaged (LHD) patients. We compared spontaneous gesturing in seven right hemisphere damaged (RHD) patients, seven LHD patients, and seven normal controls (NHD) during videotaped interviews. Two judges coded symbolic, expressive, grooming, and fidgeting gestures in 120 10-sec intervals of videotape per patient. We found that RHD patients made significantly more total gestures and grooming gestures with the hand ipsilateral to their lesion than did LHD patients. Furthermore, RHD patients made more total and grooming gestures with their right hand than NHD subjects did with either hand. There were no differences in gesture production between the right and left hands of NHD patients. These results suggest that RHD produces enhanced gesturing, particularly involving grooming behavior.
Aged↗
Factors leading to early recurrence of carotid plaque after carotid endarterectomy.
BACKGROUND: Carotid endarterectomy to remove atherosclerotic plaque restores blood flow and reduces the risk of cerebral ischemia. In some patients, however, postoperative plaque recurrence reduces the clinical benefit of carotid endarterectomy. METHODS: Using duplex ultrasound scanning, we evaluated carotid artery restenosis in 63 endarterectomy patients followed for an average of 26.6 months after surgery. RESULTS: During follow-up, two-thirds of the patients showed some observable vessel wall thickening. A negative correlation was found between years since smoking cessation and recurrence of carotid plaque. Maximum benefit was seen when smoking cessation occurred at least 1 year before endarterectomy. The least benefit was seen when smoking continued or when cessation occurred within 1 year of endarterectomy. CONCLUSIONS: Smoking status was the only cardiovascular risk factor independently and significantly associated with recurrent plaque thickness.
Aged↗
Effects of gestational and lactational exposure to coplanar polychlorinated biphenyl (PCB) congeners or 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on thyroid hormone concentrations in weanling rats.
Perinatal exposure to polychlorinated biphenyl (PCB) mixtures or to certain ortho-substituted PCB congeners dramatically reduces circulating thyroxine (T4) concentrations. It is not clear whether perinatal exposure to coplanar PCBs or 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) has a similar effect. In this study, time-mated Sprague-Dawley rats were dosed with 2 or 8 mg/kg/day PCB 77 (3,3',4,4'-tetrachlorobiphenyl), 0.25 or 1.00 micrograms/kg/day PCB 126 (3,3',4,4',5-pentachlorobiphenyl), 0.025 or 0.10 microgram/kg/day TCDD, or corn oil vehicle orally on gestation days 10-16. At weaning, plasma total T4 concentrations in PCB 77 and TCDD high-dose female pups were significantly depressed, but the changes were modest (84.4 and 79.6% of control, respectively). T4 concentrations in PCB 126 high-dose females and all high-dose males were also depressed slightly, but the changes were not statistically significant. UDP-Glucuronosyl transferase (UDP-GT) activity towards 4-nitrophenol was increased in all high-dose groups. Thus, the modest decreases in T4 could be due in part to increased T4 glucuronidation by UDP-GT. Triiodothyronine (T3) and thyroid stimulating hormone (TSH) concentrations were unchanged in all groups. In contrast to the minor changes in thyroid hormone status, liver microsomal ethoxyresorufin-O-deethylase (EROD) was markedly induced in all exposure groups and thymus weights were depressed in the high-dose groups. Because doses of coplanar PCBs or TCDD that caused marked induction of EROD activity had only minor effects on T4, we conclude that changes in thyroid hormone status at weaning are not among the more sensitive effects of perinatal exposure to these compounds.
Administration, Oral↗
In ovo administration of Salmonella enteritidis-immune lymphokines confers protection to neonatal chicks against Salmonella enteritidis organ infectivity.
We previously reported that the prophylactic, intraperitoneal administration of supernatants from concanavalin A-stimulated T cells derived from Salmonella enteritidis (SE)-immune White Leghorn hens (i.e., SE-immune lymphokines or ILK), conferred protection to neonatal White Leghorn chicks against SE organ invasion. In the present study, we evaluated the effects of in ovo administration of ILK on hatchability, hatch weight, in vitro bactericidal activity of heterophils, and protection against SE organ invasion in neonatal White Leghorn chicks. On Day 18 of embryogenesis, injections were made into the amnion with either ILK or nonimmune ILK (NILK) or were not injected (untreated). On the day of hatch, whole blood was collected from 20 of the chicks per treatment group for heterophil isolation. All remaining chicks were orally challenged with 5 x 10(4) cfu SE. Twenty-four hours after SE challenge, organs (liver and spleen) from the chicks were cultured for SE. Hatchability of ILK- and NILK-treated chicks was not different from that of untreated chicks. Hatch weights of ILK-treated chicks were approximately 1 g less (P < .05) than that of NILK-treated or untreated chicks. In vitro bactericidal activity of peripheral blood heterophils derived from ILK-treated chicks was increased (P < .05) above activity from heterophils derived from NILK-treated or untreated chicks. Organ invasion with SE was markedly and significantly decreased in the ILK-treated chicks as compared with chicks treated with NILK or untreated chicks. These results suggest that in ovo administration of ILK confers protection to neonatal chicks against SE organ infectivity at hatch.
Animals↗
Furosemide reduces the incidence of pulmonary hypertension syndrome (ascites) in broilers exposed to cool environmental temperatures.
The incidence of pulmonary hypertension syndrome (PHS; ascites) was evaluated in two experiments using broiler breeder male by-product chicks exposed after 3 wk of age to cool environmental temperatures (10 to 15 C). In Experiment 1, 3- to 6-wk-old birds were fed a grower diet to which 0 (Control), .001, .005, .010, or .015% furosemide had been added. All groups in Experiment 1 were fed a finisher ration containing no furosemide during Weeks 7 to 8. In Experiment 2, the Control group received no furosemide, a second group received .015% furosemide during the grower phase only (Weeks 3 to 6), and the third group received .015% furosemide during the grower and finisher phases (Weeks 3 to 8). Cumulative PHS mortality was significantly reduced by furosemide in both experiments. Compared with Controls, birds fed .015% furosemide did not have lower (P = .077) final body weights in Experiment 1 but did have significantly lower final body weights in Experiment 2. Lower levels of furosemide significantly reduced PHS mortality without reducing body weights. Furosemide did not improve feed conversion in either experiment. Neither body weight on Day 1 or 21 nor net Day 1 to 21 weight gain were predictive of susceptibility to PHS during the subsequent grower and finisher intervals in either experiment. On Day 55 of Experiment 2, large healthy birds fed .015% furosemide had significantly lower right:total ventricular weight ratios than control birds, indicating that furosemide reduced right ventricular hypertrophy, presumably by reducing pulmonary arterial pressure.
Animals↗
Supplemental L-arginine attenuates pulmonary hypertension syndrome (ascites) in broilers.
The incidence of pulmonary hypertension syndrome (PHS; ascites) was evaluated in two experiments using broiler breeder male by-product chicks exposed after 3 wk of age to cool environmental temperatures (10 to 15 C). In Experiment 1, 3- to 6-wk-old birds were fed a grower diet to which 0 (Control), .25, .5, or 1% supplemental L-arginine HCl had been added. During Weeks 7 to 8, all groups in Experiment 1 were fed a finisher diet containing no supplemental arginine. In Experiment 2, the Control group received no supplemental arginine, a second group was fed a grower diet supplemented with 1% L-arginine HCl (Weeks 3 to 6), and a third group was fed grower and finisher diets supplemented with 1% L-arginine HCl (Weeks 3 to 8). Cumulative PHS mortality was significantly reduced by 1% L-arginine HCl on Days 34 to 46 in Experiment 1. When data from all birds fed grower or finisher diets supplemented with 1% L-arginine HCl were pooled in Experiment 2, cumulative PHS mortality was marginally lower (P = .065) than for the Control group. Supplemental L-arginine HCl had no effect on final body weights, weight gain, or feed conversion in either experiment. Neither body weight on Day 1 or 21 nor net weight gain from Days 1 to 21 determined susceptibility to PHS during the subsequent grower and finisher intervals in either experiment.(ABSTRACT TRUNCATED AT 250 WORDS)
Animals↗
What is your diagnosis? Severed cervical trachea and substantial subcutaneous emphysema in a cat.
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Animals↗
Effects of in utero and lactational 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure on responsiveness of the male rat reproductive system to testosterone stimulation in adulthood.
Previous studies strongly suggested that 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) may cause incomplete imprinting of the male reproductive system, i.e., that in utero and lactational exposure to TCDD may alter the responsiveness of sex organs to steroids in adulthood. To test this hypothesis, male rats born to dams dosed with 0.7 microgram TCDD/kg or vehicle on Gestation Day 15 were castrated at 63 days of age and implanted with graded lengths of Silastic capsule(s) containing crystalline testosterone. Resultant plasma testosterone concentrations ranged from castrate to about fourfold higher than physiological. Male reproductive organs which are imprinted by exposure to perinatal androgens and which are highly responsive to androgen stimulation in adulthood were assessed 3 weeks later. Ventral prostate weight and protein content in TCDD-exposed rats were significantly less responsive to testosterone regardless of the amount implanted. These decreases were not secondary to alterations in plasma or prostate testosterone or 5 alpha-dihydrotestosterone concentrations in adulthood, none of which was affected by TCDD. In contrast to its effects on ventral prostate weight and protein, TCDD had no effect on responsiveness to testosterone as measured by ventral prostate DNA content; seminal vesicle weight, protein content, or DNA content; penis weight; or plasma LH concentrations. We conclude that in utero and lactational TCDD exposure inhibits imprinting of ventral prostate weight and protein but does not result in a universal inhibition of imprinting. Androgen responsiveness of the prostate is uniquely sensitive to in utero and lactational TCDD exposure and provides a model to study the mechanism by which exposure to TCDD during fetal and early postnatal development modulates hormone-mediated responses in adulthood.
Aging↗
Restraint use in inpatient rehabilitation: incidence, predictors, and implications.
The use of mechanical restraints in rehabilitation facilities focuses attention on the conflict between patient safety and independent physical function. To evaluate restraint use, we reviewed records of 323 inpatient rehabilitation admissions. Restraint orders were written for 78.3% of admissions, but used in only 32.2% of cases (mean duration of use was 16 days). Posey vests were most commonly used (78.2%). Reasons for restraint were previous fall (26.8%), impulsivity (23.7%), and inappropriate self-transfers (19.6%). Male sex, decreased mental status, low admission functional independence measure (FIM) score, stroke, or traumatic brain injury were closely associated with restraint use. Falls occurred in 25% of restrained and 10.1% of unrestrained patients. Conclusions are as follows: (1) although physician orders are required to apply restraints, nursing staff initiate, monitor, and discontinue restraint use independently; (2) traumatic brain injury or stroke, decreased admission mental status, lower FIM scores, and male sex are indicators of restraint use; (3) age is not associated with restraint use; and (4) restraints may not prevent falls.
Accidental Falls↗
Right hemisphere facial expressivity during natural conversation.
Most studies of facial expressivity in patients with focal brain lesions have examined the ability to produce emotional expression in laboratory settings using various experimental paradigms. In this study, we compared facial expressivity in right hemisphere damaged patients (RHD), left hemisphere damaged patients (LHD), and normal controls (NHD) during videotaped semistructured interviews with the patient and spouse in their home. Three research assistants rated 120 10-sec segments of videotape per patient on a 7-point expressivity scale. We found that RHD patients showed reduced facial expressivity in comparison to both LHD and NHD subjects during spontaneous conversation. In particular, RHD patients demonstrated significantly less smiling and laughter than LHD patients and normal controls. These findings were not a general feature of communicative competence in RHD patients as discourse production equaled that of normal controls. These results support the hypothesis that the right hemisphere mediates facial expressivity during spontaneous social interaction.
Aged↗
Research note: differential chemotaxis of Physarum polycephalum to Salmonella gallinarum and Salmonella pullorum.
The chemotactic and chemotropic responses of the plasmodial stage of the slime mold Physarum polycephalum were used to distinguish Salmonella gallinarum and Salmonella pullorum from 10 Salmonella serovars that are commonly isolated from domestic poultry. Utilizing an in vitro plasmodium agar plate assay method, P. polycephalum was attracted to S. gallinarum and S. pullorum, but the organism was repelled by Salmonella derby, Salmonella dublin, Salmonella enteritidis, Salmonella heidelberg, Salmonella minnesota, Salmonella montevideo, Salmonella newington, Salmonella newport, Salmonella reading, and Salmonella typhimurium.
Animals↗
Effects of different floor types and levels of washing of waterers on broiler performance and bacteria count of drinking water.
The objective of the present experiment was to determine the effect of different flooring materials and washing of waterers on broiler performance. The floor treatments were 1) black, plastic-coated expanded metal, relatively rigid (B); 2) white plastic, semi-rigid, with rectangular openings (WR); 3) white plastic, semi-rigid, with square openings (WS); and 4) 3 cm of rice hull litter (C). One hanging waterer was placed in each pen. Wash treatments were 1) trough and bell washed every Monday, Wednesday, and Friday (AW); 2) wash trough only on Monday, Wednesday, and Friday (TW); and 3) the waterers were never washed after the 2nd wk (NW). Broilers reared on C has significantly lower BW than those broilers on B floors. Broilers reared on the B and WS floors had significantly higher breast blister scores and percentage of birds with blisters than broilers reared on C floors. Broilers reared on C had lower enlarged feather follicle scores than those reared on all raised floors and a lower percentage of enlarged feather follicles than those broilers reared on WS or WR floors. Broilers reared on WS+TW had significantly better feed conversion than WS+AW, B+TW, and B+AW treatments. Broilers reared on WR+TW treatment were significantly higher in breast blister score than broilers reared on WR+AW, C+TW, and C+AW treatments. Broilers reared on C+TW and C+AW treatments were significantly lower in breast blister score except for broilers reared on C+NW, WR+AW, and WS+AW treatments. Broilers reared on C+NW treatment were significantly lower in enlarged feather follicle score than those broilers reared on B+TW, WR+AW, and WS+NW treatments.(ABSTRACT TRUNCATED AT 250 WORDS)
Animal Husbandry↗