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Some bacterial infections can spread throughout the host's body and become systemic. In plants, bacteria cause leaf spot, fire blight, and wilts. The mode of infection includes contact, air, food, water, and insect-borne microorganisms. The hosts infected with the pathogens may be treated with antibiotics, which can be classified as bacteriocidal and bacteriostatic, which at concentrations that can be reached in bodily fluids either kill bacteria or hamper their growth, respectively. Anti-septic measures may be taken to prevent infection by bacteria, for example, prior to cutting the skin during surgery or swabbing skin with alcohol when piercing the skin with the needle of a syringe. Winemakers use a variety of different yeasts depending on the type of wine and the condition of the grapes. Too high a sugar or alcohol concentration slows the growth of yeast, so for very ripe grapes with lots of sugar he or she would use a yeast tolerant of those conditions. If the yeast dies before all the fermentable sugar has been converted to alcohol, the result is a stuck fermentation. Some yeast is chosen because it tends to develop certain aromas, such as the distinctive banana smells of Beaujolais from Georges Duboeuf. Wild yeast are naturally present on the skins of grapes, so grape juice will spontaneously ferment unless the wild yeast are arrested by cold temperature or sulfates. Click on following items to see more information: Acinetobacter, Antimicrobial, Antibiotics, Antibiotics, Antimicrobial, Bacillus, Bacteria, Microorganism, Antimicrobials, Bacteriophage, Biodegradation, Campylobacter, Cell cultures, Ciprofloxacin, Corynebacterium, Escherichia coli, Escherichia coli, Escherichia coli, Escherichia coli, Escherichia coli, Escherichia coli, Erythromycin, Functional genomics, Yeasts, Growth media, Kluyveromyces, Meningococcus, Microbial, Micrococci, Multidrug resistant, Pasteurella, Prokaryotes, Pseudomonas aeruginosa, S. cerevisiae, S. cerevisiae, Salmonella, Salmonella, Staphylococcus, Staphylococcus, Streptococcal, Streptococci, Vibriosis Erwinia amylovora pathogen spreads through the tree from the point of infection via the plant's vascular system, eventually reaching the roots and/or graft junction of the plant. Once the plant's roots are affected, the death of the plant often results. Over pruning and over fertilization (especially with nitrogen) can lead to watersprouts and other midsummer growth that leave the tree more susceptible. Sprays of the antibiotics streptomycin or terramycin can prevent new infections. The use of such sprays has led to streptomycin-resistant bacteria in some areas, such as California and Washington. Certain biological controls consisting of beneficial bacteria can also prevent fireblight from infecting new trees. The only effective treatment for plants already infected is to prune off the affected branches and remove them from the area. Plants or trees should be inspected routinely for the appearance or new infections. When nutrients are scarce, myxobacteria cells aggregate by chemotaxis into fruiting bodies. These fruiting bodies can take different shapes and colors, depending on the species. Within the fruiting bodies, cells begin as rod-shaped vegetative cells, and develop into rounded myxospores with thick cell walls. These myxospores, analogously to spores in other organisms, are meant to survive until nutrients are more plentiful. The fruiting process is thought to benefit myxobacteria by ensuring that cell growth is resumed with a group (swarm) of myxobacteria, rather than as isolated cells. Similar life cycles have developed among certain amoebae, called cellular slime moulds.
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