Bacterial Spore


Also found in: Dictionary, Thesaurus, Medical.
Related to Bacterial Spore: exosporium, bacterial capsule, forespore

Spore, Bacterial

 

an oval or rounded formation that occurs within bacilliform cells (sporiferous bacteria). Within each bacterial spore is a compact mass of deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and protein. Bacterial spores are resistant to the effects of poisonous substances and other unfavorable external factors; the resistance results from the lower water content (15–20 percent) in spores than in vegetative cells, the presence of four to five dense, poorly permeable membranes, and the transition of the enzymes to an inactive state. The resistance of spores to high temperatures—some spores can survive boiling for 30 minutes or longer—is caused by the presence of a large quantity of the calcium salt of dipicolinic acid in the membranes.

Upon encountering a fresh nutrient medium, the spores germinate in a polar or equatorial manner, giving rise to new bacterialcells.

References in periodicals archive ?
The Xenex "robot" uses pulse xenon to deliver ultraviolet (UV) light throughout patient rooms, operating rooms (ORs), equipment rooms, emergency rooms, intensive care units (ICUs) and public areas to destroy viruses, bacteria and bacterial spores in just 5-10 minutes per room.
Their research revealed that PATP-induced inactivation of bacterial spores could be enhanced in this manner, and this approach could be one way to process low-acid foods using less severe heat and pressure conditions.
cereus treatments were weighed, homogenized in sterile saline (1 mg of insect tissue/100 [micro]L) and incubated at 70[degrees]C for 30 min to select for heat resistant bacterial spores.
According to research, the build-up of bacterial spores in the air vents can cause health problems, particularly for those already suffering from asthma, when the system is finally used again.
Certain bacterial spores lie dormant in cold, dry and airless conditions for millions of years and become activated in favourable conditions.
The ultrasonic lysis method developed by Cepheid elegantly addresses these problems, even for the most recalcitrant target organisms such as mycobacteria, staphylococci, and bacterial spores.
Infection begins when bacterial spores present in the soil are eaten.
High level disinfectants are required to destroy all microorganisms, including bacterial spores and must be proven to kill TB, HIV, and HBV once the items have been cleaned and heat sterilized, or cold sterilized at the appropriate temperature for the recommended amount of time.
Foremost among them is the use of processing methods that effectively kill bacterial spores.
Once established, the bacterial spores quickly multiply to deliver a rather nasty smell in the car.
Provisional microscopy examination of the fluid stained by malachite green/safranin showed bacterial spores, a large amount of debris, and vegetative bacterial cells.
2] discharge at reduced pressure: Analysis of the erosion of bacterial spores," M.