Storage temperature and viability of sporangiospores of potentially human pathogenic species of Rhizomucor from Nigerian tobacco
✍ Scribed by Dr. V. W. Ogundero; J. O. Aina
- Book ID
- 102391909
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 249 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0233-111X
No coin nor oath required. For personal study only.
✦ Synopsis
The effects of temperature on storage and viability of asexual spores of Rhizomucor pusillus (LINDT) SCHIPPER and Rhizoniucor miehei (COONEY and EMERSON) SCHIPPER were studied. An optimal germination temperature of 35 "C was recorded for both species with good results obtained around 40 -C. On prolonged storage or the spores at various temperatures (-19 ' C , 4 'C. 30 ;C, 37 "C), the best results were obtained at 4 "C and 30 'C. Very rapid losses in viability of the spores of both fungi occurred at ---I9 ' C reaching a maximum of 68":) and 51",,, respectivcly, for R. pusillus and R. miellei after 6 inoiiths of storage.
Continuous exposure of the spores to 68 'C led to rapid losses of viability of up to 1007; for those of R. prrsi//ur after 40 min exposure. Sporangiospores of R. rniehei showed more gradual losses on exposure to 68 "C.
The potential health hazards which the presence of these fungi on tobacco products pose to man are discussed.