The aim of the work was to analyse the compostable properties of bone powder produced via different treatment methods and industrial conditions, and to study their effect on plant growth and phosphorus uptake. The bones were treated in water with different temperatures, bone-water ratios and treatment times. Further treatment was carried out with citric, nitric and sulphuric acid with different concentrations, temperatures, bone-water ratios and treatment times. Industrial bone powder was composted under model industrial conditions.The available phosphorus content of these materials was estimated using ryegrass (
) as indicator plant in a climatic chamber.The water-soluble phosphorus content of the bones increased in the citric acid and sulphuric acid treatment, depending on the water treatment conditions and the acid concentration. This increase amounted to about 30 times (0.32–8.51 mg/100 mg) compared to the water treatment.The results of the plant test demonstrated that the phophorus content of treated bone powder and compost was readily available to plants. The phosphorus content of the compost was available over a longer period.
Authors:L. Majoros, G. Kardos, I. Pócsi, and B. Szabó
Data of Candida albicans and non-albicans Candida species isolated during the 1997-2000 period in the Medical and Health Science Center of the University of Debrecen are analysed. The number of yeast isolates increased from 408 to 1213 per year during this period. Dominance of C. albicans has been persistent, but a slight increase of C. glabrata and C. krusei could be observed. Distribution of different Candida species isolated from 16 body sites indicates that C. albicans seems to be still the most aggressive Candida species. Investigation of 244 urinary Candida isolates (parallel with bacterial cultures) suggests that tha aetiological role of Candida species in the pathogenesis of urinary tract infections can be hypothesized if colony forming unit (CFU) number of yeasts is higher than 104/ml and bacteria are present in low CFU number or are absent. Antifungal susceptibility testing of C. albicans, C. glabrata, C. tropicalis and C. krusei against Flucytosine, Amphotericin-B, Miconazole, Ketoconazole and Fluconazole suggests that Amphotericin-B is still the most effective antifungal agent. Finally, the problems in judging the aetiological role of isolated Candida species in the pathogenesis of different types of diseases are critically discussed.
Authors:Andrea Bistyák, S. Kecskeméti, R. Glávits, I. Tischler, S. Nagy, G. Kardos, and I. Kiss
An epizootic of Pacheco’s disease is reported from a zoo bird population. The infection was introduced by wild-captured Patagonian conures (
) despite 61 days of quarantine. The disease affected several parrot species and, interestingly, three out of seven bearded barbets (
). The mortality rate was 30.93%. Autopsy revealed abdominal hyperaemia with liver haemorrhages and, in less rapid cases, yellowish discoloration and fragility of the liver. Death was caused by the collapse of circulation. Histopathology demonstrated liver cell necrosis, disintegration of the lobular structure, and a few intranuclear inclusion bodies. Icosahedral virions were detected by electron microscopy. The virus was isolated in the allantoic cavity of embryonated chicken eggs as well as in chicken embryo fibroblast cell culture. A 281-bp-long fragment of psittacid herpesvirus DNA was detected by PCR in cell culture material and liver samples of the affected birds. To our knowledge this is the first report of Pacheco’s disease in bearded barbets as well as the first occurrence of Pacheco’s disease in Hungary.
Authors:M. Kádár, G.J. Szőllősi, Sz. Molnár, L. Kardos, and L. Szabó
Understanding the role of nutrition in the development of children’s physical, mental, and motor abilities.
Examination of visiting nurse reports on feeding habits and perceived developmental delays in infants at 1 year of age between 2010 and 2015.
Between 0 and 6 months of age the lowest number of new cases (4.4/100,000) identified by health screenings can be anticipated among the infants feeding exclusively with breastmilk. We find a similarly low number of identifiable new cases among infants nourished with breastmilk where it is mixed with other nutrients (4.7 new cases) while the most cases of delayed motor development can be anticipated among infants nourished with infant formulae (48.4 new cases).
The role of nutrition in infants’ motor development is vital, especially breastfeeding. Regular health status checks of infants are inevitably required for the adoption of higher-level health-policy decisions which may induce projects, programmes, and strategies aimed at the improvement of health. Thorough documentation and continuous collection of the pertinent data is likewise requisite.
Authors:Eszter Virág, Á. Juhász, R. Kardos, Z. Gazdag, G. Papp, Ágota Pénzes, M. Nyitrai, Cs. Vágvölgyi, and M. Pesti
Interaction of primycin antibiotic with plasma membrane, and its indirect biological effects were investigated in this study. The antifungal activity of primycin against 13 human pathogenic Candida ATCC and CBS reference species and 74 other Candida albicans clinical isolates was investigated with a microdilution technique. No primycin-resistant strain was detected. Direct interaction of primycin with the plasma membrane was demonstrated for the first time by using an ergosterol-producing strain 33erg+ and its ergosterol-less mutant erg-2. In growth inhibition tests, the 33erg+ strain proved to be more sensitive to primycin than its erg-2 mutant, indicating the importance of the plasma membrane composition in primycin-induced processes. The 64 μg ml−1 (56.8 nM) primycin treatment induced an enhanced membrane fluidity and altered plasma membrane dynamics, as measured by steady-state fluorescence anisotropy applying a trimethylammonium-diphenylhexatriene (TMA-DPH) fluorescence polarization probe. The following consequences were detected. The plasma membrane of the cells lost its barrier function, and the efflux of 260-nm-absorbing materials from treated cells of both strains was 1.5–1.8 times more than that for the control. Depending on the primycin concentration, the cells exhibited unipolar budding, pseudohyphae formation, and a rough cell surface visualized by scanning electron microscopy.
Authors:I. Kiss, P. Germán, L. Sámi, Márta Antal, T. Farkas, G. Kardos, S. Kecskeméti, Á. Dán, and S. Belák
A real-time RT-PCR assay utilising light upon extension fluorogenic primer (LUX RT-PCR) was developed for the rapid and efficient detection of avian influenza viruses (AIV). The assay detected each of the AIV isolates tested (16/16) and gave negative results with heterologous pathogens (17/17). The detection limit of the assay proved to be 10-0.5 EID50/0.2 ml and 101.5 EID50/0.2 ml in allantoic fluid of virus-infected embryonated chicken eggs and in spiked chicken faeces samples, respectively. Based on its specificity, sensitivity and relative simplicity, the LUX RT-PCR assay provides a novel, rapid and cost-effective diagnostic tool for avian influenza surveillance and monitoring programs.