Biomedical subjects

N Rieder

Publications and source records attributed to N Rieder.

11 recordsLinked to original sources

PubMed1996

Influence of accelerations on the spatial orientation of Loxodes and Paramecium.

The gravitactic ciliates Paramecium and Loxodes were cultivated for 15 days in space during the IML-2 spacelab mission. At dedicated times their behavioral responses to different accelerations between 10(-3) x g and 1.5 x g were investigated by using a slow rotating centrifuge microscope (NIZEMI). The threshold for gravitaxis of Paramecium was found to be at > 0.16 x g and < or = 0.3 x g. No adaptation of Paramecium to the conditions of weightlessness was observed over the duration of 15 days. Loxodes showed no graviresponses to increasing accelerations, though it demonstrated gravitaxis after return to earth.

Acceleration↗

PubMed1995

Cutaneous myiasis: review of 13 cases in travelers returning from tropical countries.

BACKGROUND: Cutaneous myiasis is frequently reported in patients from tropical countries. Most commonly infestation is due to Cordylobia anthropophaga and Dermatobia hominis, whereas Hypoderma lineatum is less likely to affect humans. METHODS: The clinical and parasitologic aspects in a series of 13 patients with cutaneous myiasis seen in a German travel clinic are reviewed. RESULTS: Six patients were infected with larvae of the tumbu fly, Cordylobia anthropophaga, six with larvae of the botfly, Dermatobia hominis, and one patient presented with an infection with Hypoderma lineatum. Dermatobia hominis was exclusively acquired in the American tropics and Cordylobia anthropophaga exclusively in Africa, whereas infection with Hypoderma lineatum was acquired in Nepal. The number of larvae removed from the skin was markedly higher in patients infected with the tumbu fly (average of five larvae) compared to the botfly (average of 1.7 larvae), whereas pain was more frequently reported from patients with botfly infestation. Treatment consisted in the removal of the larvae by forceps or surgical incision in tumbu or botfly infection and oral application of ivermectin in infection with Hypoderma lineatum. This led to complete recovery in all patients. CONCLUSIONS: In patients presenting with cutaneous lesions after return from tropical countries, myiasis has to be considered as a differential diagnosis. Simple and effective therapy is available through removal of the maggots.

Adult↗

PubMed1995

[Incidence of Parascaris equorum in foals and their mares after strategic use of wide-spectrum anthelmintics for several years].

In this epidemiological survey 30 foals and their mares from seven breeding farms were investigated. Six farms used wide spectrum anthelmintics strategically at least for three years, on one farm no anthelmintic prophylaxis was practiced. Excretion of P.-equorum-eggs occurred in all breeding farms and in 80% of the foals, but in only one mare. In foals infection with roundworms was detected at the earliest 85 days post partum. Before first shedding of P.-equorum-eggs wide spectrum anthelmintics had been administered to two and to one foal(s) one and two times, respectively, to four animals three times and to one foal each four, five, six and seven times. After metaphylactic use of wide spectrum anthelmintics in the control of an infection with roundworms or other helminths, eggs of P. equorum were found in one foal already 12, 17, 54, 55, 70 and 71 days after treatment with Ivomec-P each and 65 days after use of Panacur in one foal. After application of Banminth roundworm eggs were detected 12, 27, 45, 47, 49 and 62 days in one foal each and 19 and 56 days in two foals each. In eight foals each P.-equorum-eggs were noticed 72 and 196 days after anthelmintic treatment.

Animals↗

PubMed1994

[Fall/winter depression and its therapy].

Seasonal changes in human behavior have been recognized since ancient times. Starting in 1980 systematic research has been carried out by Rosenthal et al. (1984), who described and characterized a psychopathological and clinical syndrome which is linked to fall/winter and shows remission in spring/summer and which was termed seasonal affective disorder (SAD). The symptomatology includes depressed mood, decreased energy, hypersomnia, increased appetite and subsequently weight gain and frequently carbohydrate craving. The efficacy of light therapy with bright, fluorescent, full-spectrum light has been widely demonstrated for treatment of fall/winter SAD. In addition, treatment with selective serotonin reuptake inhibitors appears to be successful in this condition.

Antidepressive Agents↗

PubMed1994

[Eimeria leuckarti infections in foals and their mothers in upper Bavaria].

In this epidemiological study 30 mares and their foals from seven farms in Upper Bavaria were investigated. Eimeria-leuckarti-oocysts were found in 24 foals (80%), but only in one mare. Oocysts were first detected 28 days post partum at the earliest and 191 days post partum at the latest. In foals, excretion of oocysts usually occurred intermittently with coproscopically negative intervals of up to 15 weeks, and was most frequent in June (8 foals), July (17 foals), and August (10 foals). With the exception of two animals which had mild diarrhoea, the oocyst-shedding foals showed no clinical signs.

Animals↗

PubMed1991

[Personality profile in bipolar schizoaffective psychoses. A comparison with bipolar affective psychoses].

The aim of this study was to investigate personality profiles in patients with bipolar affective and schizoaffective disorder, classified according to ICD-9 criteria using objective psychological tests (Personal Research Form, Objective Analytical Test Battery, IPC-Query Form). The bipolar schizoaffective patients were further subtyped according to Research Diagnostic Criteria (RDC) into schizoaffective-affective and schizoaffective-schizophrenic patients. 81 patients took part in the study (29 bipolar affective and 52 bipolar schizoaffective patients; the latter were subtyped into 23 schizoaffective-schizophrenic and 29 schizoaffective-affective patients). We showed that the personality profiles are quite similar in schizoaffective-affective and schizoaffective-schizophrenic patients if compared to purely affective patients. But indeed there are pronounced differences between the schizoaffective-affective and the schizoaffective-schizophrenic subtypes, so that subtyping schizoaffective disorder like done in Research Diagnostic Criteria (RDC) seems to show that schizoaffective disorders are not a homogenous group.

Adult↗

PubMed1972