493
Pseudomonas putida
Characteristics of the Disease
Altinok et al. ( 2006 ) described exophthalmia, melanosis and ulcers on the dorsal
surface of rainbow trout in grow out ponds in Turkey. The internal organs appeared
normal, but the intestine was full of yellowish liquid.
Characteristics of the Pathogen
There has been a casual mention of Ps. putida as a fi sh pathogen in Japan (Muroga
1990 ). The organism was recovered from diseased (the disease was described as
bacterial haemorrhagic ascites) ayu in Japan, and equated with Pseudomonas
(Wakabayashi et al. 1996 ). Similarities were noted to Ps. putida, but there was an
absence of fl uorescent pigment and a lack of agglutination with antiserum prepared
to the type strain (of Ps. putida). The profi le, obtained with the API 20NE rapid
identifi cation system, was “1140452” (Wakabayashi et al. 1996 ). In a subsequent
study, Altinok et al. ( 2006 ) identifi ed a pathogen as Ps. putida on the basis of 16S
rRNA sequencing (homology = 99.8 %) and phenotypic characteristics.
Stenotrophomonas maltophilia
The organism was recovered in India during 2014 from African catfi sh ( Clarias
gariepinus ), which were farmed in earthern ponds (Abraham et al. 2016 ) and may
be an emerging pathogen of catfi sh ( Ictalurus punctatus ) in China (Geng et al.
2010a ).
Box 9.9: Pseudomonas putida
Cultures are fl uorescent, motile Gram-negative rods, which produce arginine
dihydrolase and oxidase but not ß-galactosidase, H 2 S or indole, grow at 4 but
not 41 °C, do not attack aesculin, gelatin or urea, and produce acid from arabinose, capric acid, glucose, malate, potassium gluconate and trisodium citrate
but not adipic acid, maltose, mannitol, D-mannose, rhamnose, sorbitol or
sucrose (Altinok et al. 2006 ).
Stenotrophomonas maltophilia
Pseudomonas putida
Characteristics of the Disease
Altinok et al. ( 2006 ) described exophthalmia, melanosis and ulcers on the dorsal
surface of rainbow trout in grow out ponds in Turkey. The internal organs appeared
normal, but the intestine was full of yellowish liquid.
Characteristics of the Pathogen
There has been a casual mention of Ps. putida as a fi sh pathogen in Japan (Muroga
1990 ). The organism was recovered from diseased (the disease was described as
bacterial haemorrhagic ascites) ayu in Japan, and equated with Pseudomonas
(Wakabayashi et al. 1996 ). Similarities were noted to Ps. putida, but there was an
absence of fl uorescent pigment and a lack of agglutination with antiserum prepared
to the type strain (of Ps. putida). The profi le, obtained with the API 20NE rapid
identifi cation system, was “1140452” (Wakabayashi et al. 1996 ). In a subsequent
study, Altinok et al. ( 2006 ) identifi ed a pathogen as Ps. putida on the basis of 16S
rRNA sequencing (homology = 99.8 %) and phenotypic characteristics.
Stenotrophomonas maltophilia
The organism was recovered in India during 2014 from African catfi sh ( Clarias
gariepinus ), which were farmed in earthern ponds (Abraham et al. 2016 ) and may
be an emerging pathogen of catfi sh ( Ictalurus punctatus ) in China (Geng et al.
2010a ).
Box 9.9: Pseudomonas putida
Cultures are fl uorescent, motile Gram-negative rods, which produce arginine
dihydrolase and oxidase but not ß-galactosidase, H 2 S or indole, grow at 4 but
not 41 °C, do not attack aesculin, gelatin or urea, and produce acid from arabinose, capric acid, glucose, malate, potassium gluconate and trisodium citrate
but not adipic acid, maltose, mannitol, D-mannose, rhamnose, sorbitol or
sucrose (Altinok et al. 2006 ).
Stenotrophomonas maltophilia