The incidence of allergic airway diseases continues to increase in industrial countries while remaining much more stable in developing countries. Allergens inhaled are eventually also swallowed and evidently the gastrointestinal immune system has a role in regulating allergic responses in the pulmonary as well as the GI system. While some studies have pointed out the role of probiotic bacteria as a supplementary protection against the early development of various allergies, little attention has been paid to the composition of the airborne microflora first and continuosly inhaled by newborns and infants. This study compares the composition of two airborne microbial communities, one from hospital delivery rooms and the other from a nature reserve, evidently in use as a birthing place as early as 7500 B.C. around the air from the outdoor birthing place was marked by a far greater variation in microbial composition and a much higher representation of fungi than the air from the hospitals. The dominant bacterial species from the delivery rooms were Staphylococcus areus and Micrococcus luteus, originating from the staff and the hospital environment; the outdoor flora, however, was dominated by Pseudomonas spp. and Bacillus spp. In addition, 56% of all the bacterial isolates from the delivery rooms were most closely related to strains previously associated with clinical infections, whereas only 15% of isolates in the outdoor bacterial sample had such relationships. The role of airborne microorganisms could be important to infants with developing immune systems considering the microbial bias of hospital air presented in this study.
quality in many cities has been deteriorating and affecting population’s
health. Airborne particles can block the defense mechanisms of respiratory
system and may lead biological elements such as pollen, bacteria, fungi and
viruses into the lungs. This paper presents the study of biologically
contaminated air in the city of Hermosillo, analyzing filters containing
particulate matter with a diameter equal or less than 10 micrometers (PM10)
and Total Suspended Particles (TSP). Three sampling periods were analyzed
during 2011. Samples taken from the filters were placed in tubes containing
nutritive broth BHI (Brain Heart Infusion) and incubated at 37 °C for 24 hours.
The identification of the isolated microorganisms was done by a biochemical
test recommended in Bergey’s Manual. Results showed a high bacteria
concentration in the presence of microorganisms such as Klebsiella pneumoniae sub pneumoniae, Citrobacter, Enterococcus
faecalis, Proteus penneri, Butiauxellaagrestis, Salmonella paratyphi A and Enterobacter sacazakii. When bacterial
concentration was analyzed separately, the lowest number of bacteria was
observed during February for the south location and in August for the north
location. The highest degree of bacterial air pollution was found in the
central area of the city.
of drug resistant microbes (bacteria) had forced researchers to search new and
improved therapeutic compounds from different possible sources, including
metabolites secreted by the actinomycetes. The aim of this study was to
evaluate the pattern of antimicrobial actinomycetes from physiologically
distinct soil of different geographical locations. Forty five soil samples were
collected from 5 districts of Gujarat including two sanctuaries as source of
survey for bioactive actinomycetes. Crowded plate technique was used for
isolation and Agar cylinder method was employed for the antimicrobial
screening. A total of 171 actinomycetes were isolated and screened against
eighteen pathogens responsible for causing diseases in plants and humans.
Results indicate that 79% of the isolates were active against at least one of
the eighteen tested pathogens. Some of the actinomycetes strain had shown
strong antibacterial and antifungal activity which may be a good source of
obtaining novel antimicrobials.