Metody sekvenování nové generace (NGS) poprvé vnesly hlubší pohled do diverzity lidského střevního mikrobiálního ekosystému, jehož velikost je nečekaně veliká. Poměr lidských a mikrobiálních buněk se pohybuje v rozmezí od 1:1 až po 1:100 a lze říci, že jak lidé, tak i další savci žijí ve složitých konsorciích složených z virů, archaeí a bakterií tvořící mikrobiom spolu s mikroskopickými houbami a jednobuněčnými a mnohobuněčnými eukaryoty, tj. prvoky a helminty. Největší pozornost je prozatím věnována bakteriálnímu mikrobiomu představujícímu možná nejvíce různorodý segment ekosystému lidského těla., The Next Generation Sequencing (NGS) methods has brought a deeper insight into the diversity of a human intestinal microbial ecosystem. The ratio of human and microbial cells ranges from 1:1 to 1:100. One might say that humans (and other mammals) live in a complex consortium of viruses, bacteria, archaea - forming what is known as a microbiome - together with microscopic fungi, unicellular and metazoan eukaryotes (protists and helminths). Most attention has so far been paid to the bacterial microbiome that signifies perhaps the most diverse segment of the ecosystem of human body., and Jan Votýpka, Kateřina Jirků Pomajbíková.
Chlorophyll Fluorescence in Aquatic Sciences (AQUAFLUO) Conference in Nové Hrady between May 28 and June 1 was the first of its kind and enabled researchers from a variety of fields to discuss current aquatic research problems. Addressing the conference was Prof. Paul Falkowski of Rutgers University, a member of prestigious (U.S.) National Academy of Sciences and specialist in Geological Sciences and Marine and Coastal Sciences. As such he is engaged in iron fertilizer for phytoplankton and phytoplankton´s role in the carbon dioxide cycle. Professor Falkowski gave Academic Bulletin a brief interview. and Gabriela Štefániková.
A nonpigmenting strain of Serratia marcescens Bizio isolated from dead and apparently diseased wild apple maggot flies, Rhagoletis pomonella (Walsh), was shown to be pathogenic to healthy apple maggot flies upon ingestion. The microorganism was detected in live adult alimentary canal organs four days post ingestion but produced death in some flies within 24 h when flies fed on a cell concentration of 4.7 × 104 cfu/ml and within 8 h when flies fed on filter-sterilized culture medium that previously contained a 21 h culture of S. marcescens. Increasing the cell concentration 10,000 fold did not lead to an increased rate of kill. Young flies (7-10 days old) were more susceptible to infection leading to death than were older flies (21-28 days old). The potential use of S. marcescens cells as control agents against apple maggot flies is negated by their pathogenicity to vertebrates; however, the potential use of toxic compounds produced by this strain of S. marcescens is discussed.