ibanez
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Recent developments
There is extensive phylogenetic analysis and molecular support for the taxonomic re-assignment of Cryptocaryon irritans. It was recently recommended that this protozoan ectoparasite be taxonomically reassigned to the order Prorodontida within the class Prostomatea and a new family name has been suggested, Cryptocaryonidae (Wright & Colorni, 2002).
Alarming new evidence has come to the attention of the scientific community that Cryptocaryon irritans is adapting to new environments. The parasite has been exposed to different survival pressures, necessitating its constant adaptation and variation (Yambot, et al., 2003). Several new strains have been discovered (Diggles & Adlard, 1995, 1997; Diggles & Lester, 1996a,b,c. Jee et al., 2000). It has been found in new regions, at cooler temperatures (12-16C) than previously reported (Jee, et al., 2000). Until recently, it was believed that the disease would not develop below 19C (Nigrelli & Ruggieri, 1966. Diggles & Lester, 1996b. Gordin, 1969). Highly aberrant strains have recently been found thriving in hyposaline environments in Taiwan (Yambot et al., 2003). With the news that Cryptocaryon irritans is spreading to new geographical locations and adapting to a wider range of temperature and salinity comes the need for fresh new strategies and treatments for its control.
Recent developments
There is extensive phylogenetic analysis and molecular support for the taxonomic re-assignment of Cryptocaryon irritans. It was recently recommended that this protozoan ectoparasite be taxonomically reassigned to the order Prorodontida within the class Prostomatea and a new family name has been suggested, Cryptocaryonidae (Wright & Colorni, 2002).
Alarming new evidence has come to the attention of the scientific community that Cryptocaryon irritans is adapting to new environments. The parasite has been exposed to different survival pressures, necessitating its constant adaptation and variation (Yambot, et al., 2003). Several new strains have been discovered (Diggles & Adlard, 1995, 1997; Diggles & Lester, 1996a,b,c. Jee et al., 2000). It has been found in new regions, at cooler temperatures (12-16C) than previously reported (Jee, et al., 2000). Until recently, it was believed that the disease would not develop below 19C (Nigrelli & Ruggieri, 1966. Diggles & Lester, 1996b. Gordin, 1969). Highly aberrant strains have recently been found thriving in hyposaline environments in Taiwan (Yambot et al., 2003). With the news that Cryptocaryon irritans is spreading to new geographical locations and adapting to a wider range of temperature and salinity comes the need for fresh new strategies and treatments for its control.
