β-1,3-Glucanase production as an anti-fungal enzyme by phylogenetically different strains of the genus Clostridium isolated from anoxic soil that underwent biological disinfestation

Abstract Background: Fungal infections are one of the most prevailing worldwide public health issues. Despite the commercially available antifungal drugs, side effects associated with these agents and resistance may lead to the development of antifungal drugs by using advanced technology. Main body of the abstract: In the current era, nanotechnology is one of the most predominant techniques with massive advantages in the field of medicines and medical sciences. In the last two decades, various nanostructures were developed based on metals, plants, and microorganisms. The aim of the review is to discuss all original researches and to review articles of the last two decades, including earlier and recent development in different types of nanostructures as an antifungal therapy. Published papers in the English language were searched and reviewed from the online databases from January 2007 till May 2021. The search engines included were PubMed, Google, Google scholar, and Sciencedirect. In all the databases, the keywords “fungi”, “antifungal”, “nanomaterials”, “nanostructures” and “nanotechnology” were used for literature search. Short conclusion: The innovative nanostructures are vital for the treatment of different strains of fungal infections i.e. from minor nail infections to major systemic fungal infections. Additionally, nanostructures also enhance the efficacy, solubility, penetration, and drug release to the targeted site of conventional antifungal agents.

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Isolation, Identification and Investigation of Fermentative Bacteria from Sea Bass (Dicentrarchus labrax): Evaluation of Antifungal Activity of Fermented Fish Meat and By-Products Broths

Foods ◽

10.3390/foods9050576 ◽

2020 ◽

Vol 9 (5) ◽

pp. 576

Author(s):

Francisco J. Martí-Quijal ◽

Andrea Príncep ◽

Adrián Tornos ◽

Carlos Luz ◽

Giuseppe Meca ◽

...

Keyword(s):

Antifungal Activity ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Added Value ◽

Minimum Fungicidal Concentration ◽

Fish Meat ◽

Fermentative Bacteria ◽

Different Strains ◽

Anti Fungal ◽

By Products

During fish production processes, great amounts of by-products are generated, representing ≈30–70% of the initial weight. Thus, this research study is investigating 30 lactic acid bacteria (LAB) derived from the sea bass gastrointestinal tract, for anti-fungal activity. It has been previously suggested that LAB showing high proteolitic activity are the most suitable candidates for such an investigation. The isolation was made using a MRS (Man Rogosa Sharpe) broth cultivation medium at 37 ºC under anaerobiosis conditions, while the evaluation of the enzymatic activity was made using the API® ZYM kit. Taking into account the selected bacteria, a growing research was made fermenting two kinds of broths: (i) by-products (WB), and (ii) meat (MB). Both were fermented at three different times (24, 48 and 72 h). Then, the antifungal activities of both fermented by-products and meat broths were determined qualitatively and quantitatively in solid and liquid medium against two different strains of the genera Penicillium, Aspergillus and Fusarium. After the experiments, a total of 30 colonies were isolated, observing a proteolytic activity in 7 of the isolated strains, which belong to Lactobacillus genus, and the two more active strains were identified by polymerase chain reaction (PCR) as L. plantarum. Several strains evidenced antifungal activity showing an inhibition halo and Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC) values between 1–32 g/L and 8–32 g/L, respectively. In conclusion, the isolated bacteria of sea bass had the ability to promote the antifungal activity after the fermentation process, thus being a useful tool to give an added value to fish industry by-products.

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Ultrastructural Changes of the Symbiotic Chlorella-Like Alga Isolated from Hydra Viridis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100054212 ◽

1982 ◽

Vol 40 ◽

pp. 320-321

Author(s):

K.W. Lee ◽

R.H. Meints ◽

D. Kuczmarski ◽

J.L. Van Etten

Keyword(s):

Time Course ◽

Reciprocal Cross ◽

Ultrastructural Level ◽

Ultrastructural Changes ◽

Symbiotic Relationship ◽

Cell Recognition ◽

Green Hydra ◽

Different Strains ◽

Hydra Viridis

The physiological, biochemical, and ultrastructural aspects of the symbiotic relationship between the Chlorella-like algae and the hydra have been intensively investigated. Reciprocal cross-transfer of the Chlorellalike algae between different strains of green hydra provide a system for the study of cell recognition. However, our attempts to culture the algae free of the host hydra of the Florida strain, Hydra viridis, have been consistently unsuccessful. We were, therefore, prompted to examine the isolated algae at the ultrastructural level on a time course.

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