African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12191

Full Length Research Paper

The microbiological effects of hospital wastes on the environment

Oyeleke, S. B.* and Istifanus, N.
  Department of Microbiology, Federal University of Technology, Minna.
Email: [email protected]

  •  Accepted: 30 January 2009
  •  Published: 06 April 2009

Abstract

 

The effect of twenty four (24) hospital wastes samples taken from different hospitals waste dumpsites on its surrounding soil was examined. The counts of microorganisms in hospital dumpsite soil include the following; aerobic heterotrophic counts from 4.2 x 10to 1.6 x 1010, anaerobic heterotrophic counts from 1.0 x 10to 1.6 x 10while fungi counts from 0 to 6.9 x 106. The counts in soil adjacent to dumpsites include the following; aerobic heterotrophic counts from 1.0 x 105 to 4.0 x 109, anaerobic heterotrophic counts from 1.0 x 105 to 5.0 x 108,while fungi counts is between 0 to 1.0 x 106. Bacteria isolated at the soil dumpsite and soil adjacent to dumpsites include, respectively, Bacillus sp. (42.86 and 45%),Micrococcus roseus (14.29 and 10%), Staphylococcus epidermidis (9.52 and 10%), Corynebacterium equi (1.59 and 5%), Bacillus subtilis (4.76 and 5%), B.licheniformis (9.52 and 10%), and Actinomyces istraelii (3.17 and 5%). Fungi isolated include Rhizopus nigricans (27.59 and 18.52%), Aspergillus flavus (13.79 and 3.70%), Penicillium rubrum (6.86 and 3.70%), Trichothecium roseum (0 and 3.70%), Penicillium viricadum (6.90 and 0%) Aspergillus niger (34.48 and 44.44%),Aspergillus nidulans (0 and 11.11%), Aspergillus visicolor (3.45 and 3.45%),Aspergillus parasiticus (0 and 7.41%), and Microsporum canis (6.9 and 0%). The dumpsites soil recorded higher pH value than the adjacent soil. The investigation revealed that the hospital waste dumpsites may have adverse effects on its immediate environment.

 

Key words: Hospital wastes, aerobic counts, anaerobic heterotrophic counts, soil dump site and soil adjacent.