Dermatomycosis in Dogs

During the routine examination of dogs for cutaneous lesions, 205 dogs were screened for fungi other than dermatophytes. Twenty-two dogs (10.8%) revealed the presence of non-dermatophytic fungi suspicious for representing the etiologic agents of the skin lesions. The fungi isolated were Alternaria sp. (2.9%), Penicillium sp. (2.4%), Aspergillus fumigatus (2.0%), Mucor sp. (1.5%), Cladosporium sp. (1.5%) and Fusarium sp. (0.5%). No dermatophyte was isolated in association with these fungi. The incidence of these infections was found to be greater in warm and humid climate.     

应用DSI试验观察互隔交链孢霉提取物的诱变性

应用DSI试验对食管癌高发区河南林县粮食中分离的互隔交链孢霉的提取物进行诱变性研究。在五个数量级浓度中,互隔交链孢霉提取物均能明显地抑制DNA的合成。其抑制率为51.2%～62.8%,有明显的剂量相关性。与对照组相比有极显著差异(P<0.01)。追踪观察表明,经10~-3mg/ml浓度的提取物作用后,靶细胞DNA合成速度在与提取物脱离接触后的0.5h内呈进行性下降,以后才逐渐回升,在0.5h处形成一个DNA合成的谷值。故可认为,互隔交链孢霉提取物中含有损伤性DNA合成抑制剂,但损伤修复较快。结果表明,互隔交链孢霉提取物中含有诱变性物质。     

内生真菌YD-01次生代谢产物的研究Ⅰ.

目的：研究交链孢霉属真菌（Alternaria sp．）YD-01次生代谢产物的化学成分。方法：应用多种色谱方法进行分离和纯化，并用NMR、IR和MS等方法解析其化学结构。结果：从交链孢霉属真菌YD-01次生代谢产物中分离到3个化合物，它们的结构分别被鉴定为：石杉碱甲（1），6-甲氧基-7，4’-二羟基异黄酮（2），4-羟基苯基-（-D-葡萄吡喃糖苷（3）。结论：微生物发酵是生产石杉碱甲一条新途径，     

Organization of ribosomal RNA genes in Alternaria alternate Japanese pear pathotype,a host-selective AK-toxin-producing fungus

Summary DNA encoding ribosomal RNA (rRNA) of Alternaria alternata Japanese pear pathotype has been cloned in , replacement vector, , Fix. Restriction endonuclease mapping and Southern hybridization with the 18S and 28S rRNAs of Saccharomyces cerevisiae revealed the A. alternata rDNA to be tandemly repeating 8.15-kilobase pair unit. The restriction fragments of the unit were then subcloned in the plasmid vector Bluescribe M13- and partially sequenced. The determined sequences were compared with previously reported sequences of S. cerevisiae rRNAs and their genes. The locations of DNA sequences encoding the 5.8S, 18S, and 28S rRNAs were determined by homology search using reported sequences. The complete DNA sequence for 5.8S rRNA of the fungus was found to be highly conserved at more than 90 % homology in the fungi analyzed. However, sequence diversities were observed in limited regions involved in a helix structure, the helix (e), found at position 116–137.Deceased     

Evaluation of the prevalence of skin prick test positivity to Alternaria and Cladosporium in patients with suspected respiratory allergy

D'Amato G, Chatzigeorgiou G, Corsico R, Gioulekas D, Jäger L, Jäger S, Kontou-Fili K, Kouridakis S, Liccardi G, Meriggi A, Palma-Carlos A, Palma-Carlos ML, Pagan Aleman A, Parmiani S, Puccinelli R Russo M, Spieksma FThM, Torricelli R, Wüthrich B. Evaluation of the prevalence of skin prick test positivity to Alternaria and Cladosporium in patients with suspected respiratory allergy. A European multicenter study promoted by the Subcommittee on Aerobiology and Environmental Aspects of Inhalant Allergens of the European Academy of Allergology and Clinical Immunology.
This trial was undertaken to study, in several geographically spread European countries, the prevalence of skin prick test (SPT) positivity to Alternaria (A) and Cladosporium (C) in subjects with nasal and/or bronchial symptoms of suspected allergic cause. Each patient completed an anamnestic questionnaire and underwent SPT with a panel of common inhalant allergens and also A and C supplied by three different laboratories, to allow for manufacturer bias. Specific scrum IgE determination was carried out only in subjects with SPT positivity to A and/or C with an immunoassay system. In nine European allergology centers, a total of 877 subjects was enrolled in the trial; 83 of them showed SPT positivity to A and/or C; only nine patients showed monosensitization to A , and none to C The highest percentage of positive subjects was found in Spain (20%); the lowest in Portugal (3%). In the other seven centers, the variation was 7–10%. The age range of mold-positive subjects was 5–60 years. Rhinitis was by far the most common symptom, whether associated or not with asthma and/or conjunctivitis.     

Simultaneous Detection of Seven Alternaria Toxins in Mixed Fruit Puree by Ultra-High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled with a Modified QuEChERS

The presence of Alternaria toxins (ATs) in fruit purees may cause potential harm to the life and health of consumers. As time passes, ATs have become the key detection objects in this kind of food. Based on this, a novel and rapid method was established in this paper for the simultaneous detection of seven ATS (tenuazonic acid, alternariol, alternariol monomethyl ether, altenuene, tentoxin, altenusin, and altertoxin I) in mixed fruit purees using ultra-high performance liquid chromatography-tandem mass spectrometry. The sample was prepared using the modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) method to complete the extraction and clean-up steps in one procedure. In this QuEChERS method, sample was extracted with water and acetonitrile (1.5% formic acid), then salted out with NaCl, separated on an ACQUITY UPLC BEH C₁₈ with gradient elution by using acetonitrile and 0.1% formic acid aqueous as eluent, and detected by UPLC-MS/MS under positive (ESI⁺) and negative (ESI⁻) electrospray ionization and MRM models. Results showed that the seven ATs exhibited a good linearity in the concentration range of 0.5–200 ng/mL with R² > 0.9925, and the limits of detection (LODs) of the instrument were in the range of 0.18–0.53 μg/kg. The average recoveries ranged from 79.5% to 106.7%, with the relative standard deviations (RSDs) no more than 9.78% at spiked levels of 5, 10, and 20 μg/kg for seven ATs. The established method was applied to the determination and analysis of the seven ATs in 80 mixed fruit puree samples. The results showed that ATs were detected in 31 of the 80 samples, and the content of ATs ranged from 1.32 μg/kg to 54.89 μg/kg. Moreover, the content of TeA was the highest in the detected samples (23.32–54.89 μg/kg), while the detection rate of Ten (24/31 samples) was higher than the other ATs. Furthermore, the other five ATs had similar and lower levels of contamination. The method established in this paper is accurate, rapid, simple, sensitive, repeatable, and stable, and can be used for the practical determination of seven ATs in fruit puree or other similar samples. Moreover, this method could provide theory foundation for the establishment of limit standard of ATs and provide a reference for the development of similar detection standard methods in the future.