J Parasitol. 2009 Jan 22:1. [Epub ahead of print]
LONG-TERM SURVIVAL OF TOXOPLASMA GONDII SPORULATED OOCYSTS IN SEAWATER
Lindsay DS, Dubey JP.
Toxoplasma gondii is now recognized as an important pathogen in costal marine mammals. Oocysts from cat feces are believed to be washed in to seawater and serve as a source of infection via transport hosts. Experimentally it has been demonstrated that T. gondii oocysts can sporulate in seawater and remain infectious for mice for up to 6 mo. The present study examined the long-term survival of T. gondii in seawater (15 ppt NaCl) kept at 4 C or room temperature. Oocysts kept at 4 C for 24 mo were orally infectious for mice, while those kept at room temperature for 24 mo were not.
PMID: 19161250 [PubMed - as supplied by publisher]
1 comment:
I have oocysts obtained from diarrhea. They have been stored in vitro at 37C for over a month, and are still viable. The replication of oocysts has declined, but sporulation occurs continually. The "zoites" can easily be transferred from original sample but oocyst replication stops. The original specimen must have delicate balance of chemical metabolites to conserve specimen in native supernatant.
The complexity of this particular specimen exceeds that of toxo. I am the primary host. This could be for life, until I discover a cure.
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