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Isolation of Serratia fonticola from pirarucu Arapaima gigas
Choresca Jr, Casiano H.,Kim, Ji-Hyung,Gomez, Dennis K.,Jang, Hwan,Joh, Seong Joon,Park, Se Chang The Korean Society of Veterinary Science 2008 大韓獸醫學會誌 Vol.48 No.1
The pirarucu, Arapaima gigas (body weight = 18.3 kg and total length = 102 cm) which had been reared in one of the private commercial aquaria for exhibition was found dead and submitted for diagnostic examination. A pure bacterial culture was isolated from the kidney, which was enlarged, and contained fluids. Result of the bacterial identification yielded Serratia fonticola. This paper describes the first isolation of S. fonticola from pirarucu.
Choresca, Casiano H. Jr.,Gomez, Dennis K.,Han, Jee-Eun,Shin, Sang-Phil,Kim, Ji-Hyung,Jun, Jin-Woo,Park, Se-Chang The Korean Society of Veterinary Science 2010 大韓獸醫學會誌 Vol.50 No.4
Moribund albino catfish, Clarias sp., displayed from an indoor private commercial aquarium were submitted in the laboratory for diagnostic examination. Dense culture of bacteria was recovered from the kidney and was characterized using Vitek System 2 and showed 98% probability to Aeromonas (A.) hydrophila. PCR result showed positive using A. hydrophila extracellular hemolysin gene ahh1 (130 bp) and aerolysin gene aerA (309 bp). The 16S rRNA gene was identical and exhibited 97% sequence similarity with the other known isolates of A. hydrophila available in the GenBank. In this paper, we reported the isolation and molecular detection of A. hydrophila from an albino catfish.
Selective non digestion of yellow mealworm Tenebrio molitor larvae by arowana
Gomez, Dennis Kaw,Kim, Ji Hyung,Choresca, Casiano Hermopia Jr.,Baeck, Gun Wook,Park, Se Chang The Korean Society of Veterinary Science 2007 大韓獸醫學會誌 Vol.47 No.2
This study reveals the unusual case reported for the first time on the selective non digestion of yellow mealworm (Tenebrio molitor) larvae by arowana fish. In January 2005, an Asian arowana (Scleropages formosus) (red variety), from Daesang Tropical Fish Corporation, Seoul, Korea, mortality was observed due to unknown cause. No putative causal factors were suggested by bacteriological and parasitological examinations. Internal examination of the dissected stomach showed some undigested debris with mandible parts of mealworms attached to the mucosal lining of stomach wall. Feeding experiment of yellow mealworm (Tenebrio molitor) was conducted on the silver arowana (Osteoglossum bicirrhosum). Result showed that on the test group, fish released vomitous material containing undigested mandibles of mealworm was observed on the 24th day of the feeding experiment. Histopathological examination of the cross section of the stomach wall layers of the test groups, showed detached parts of the mucosal layer and gastric pits around the damaged area with intact mucularis tissues. While the control group fed with mealworm larvae without head part showed intact stomach wall layers consisting of gastric pit, mucosa and mucularis tissues. Fish on both treatments survived until the termination of experiment. The removal of mealworm larvae head before feeding probably help or aid in the fast digestion of these insect larvae.
Dennis K. Gomez,Casiano H. Choresca Jr,Ji Hyung Kim,Se Chang Park 한국실험동물학회 2007 Laboratory Animal Research Vol.23 No.1
Sensitivity of diagnostic methods for detection HPV infection at earlier stages of shrimp is very important for the prevention of widespread and losses in shrimp hatcheries. The earliest postlarval stage detected with HPV infection was 3 days old (PL₃ The presence of hypertrophied nucleus in the hepatopancreas tubule epithelial cell diagnostic of HPV intranuclear inclusion body is indicative of HPV infection. Histological method (H&E) was significantly (P < 0.01) sensitive than impression smear in the diagnosis of HPV infection in Penaeus monodon postlarvae (PL₃ to PL₂₉) reared at two stocking densities (25 and 50 PL/liter). This study showed low diagnostic suitability of Giemsa impression smear and advantage of histological method when HPV infection prevalence is low. There was no significant increase in the detection rate of HPV infection in postlarval stages at two rearing densities.