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Simple Summary: In this retrospective study, three dogs and three cats were selected from the database of the Chonnam National University Teaching Hospital from February 2017 to June 2019. The inclusion criteria for the selection of patients were as follows: (1) clinical data including age, sex, breed, clinical signs, histology, fine-needle aspiration, or fluid centesis were available and (2) intraluminal CEUS was performed; CEUS findings helped confirm the diagnosis. Each patient underwent physical examination, blood tests, radiography, and conventional ultrasonography. Intraluminal CEUS was performed using contrast agents, including SonoVue, agitated saline, saline, or a combination for GI hydrosonography in two patients and sono-cystourethrography in four patients. GI hydrosonography could assess the anatomic relationship between the mass and gastric lumen after administration of a mixture of 0.1 mL SonoVue and 30 mL/kg water in case 1 and could dilate the colonic lumen to detect the thickened wall using saline infusion in case 2. Upon sono-cystourethrography, communication between the urinary tract and prostatic cyst was clearly visualized in case 3, and narrowing of the urethral lumen secondary to prostatomegaly could be ruled out in case 4 with pyogranulomatous prostitis using agitated saline. The saline or agitated saline is appropriate for filling the lumen and improving the acoustic window for GI hydrosonography. Intraluminal CEUS examinations helped to assess the patency of the lumen, evaluate the extent of luminal dilation, rule out luminal narrowing, determine the presence of a mass within the lumen, and identify rupture sites. Administering intraluminal fluid can improve the acoustic window for the visualization of the lumen and wall layers in the cavitary organs. Microbubbles in ultrasound contrast agents can also be used for intracavitary applications to enhance visualization of the lesion in human patients. However, there was no literature extending the clinical application of intraluminal contrast-enhanced ultrasonography (CEUS) to patients with naturally occurring diseases in veterinary medicine. This case series aims to describe the detailed application and diagnostic value of intraluminal CEUS in six clinical cases with naturally occurring gastrointestinal (GI) and urinary tract diseases. [ABSTRACT FROM AUTHOR]

Escherichia coli (E. coli) can be transmitted from dogs to surfaces through direct exposure to dog faeces, pus, and urine; alternatively, it can live in the environment for a short period. We aimed to determine the prevalence and antibiotic resistance profile of E. coli from dogs and environmental surfaces of animal clinics in Phnom Penh, Cambodia. We swabbed twenty-four samples from dogs (18 faeces and 6 pus) and twenty-three from environmental surfaces (8 cage-floors, 7 cage-walls, 1 feeding-plate, and 7 treatment-tables) at animal clinics. The bacterial culture method was used to isolate E. coli from both dog and environmental surface samples. An antibiogram of the isolates was tested using the disk diffusion method with six antibiotics (amoxicillin, ampicillin, ceftriaxone, gentamycin, levofloxacin, and tetracycline), following the standard of the Clinical and Laboratory Standard Institute. The results showed that E. coli was present in approximately 54% of dog samples and 22% of environmental surface samples. The E. coli isolates from dog samples showed high resistance to amoxicillin, ampicillin, and tetracycline (54%) and lower resistance to ceftriaxone, gentamycin (27%), and levofloxacin (8%). E. coli isolates from environmental surfaces demonstrated high resistance to amoxicillin, ampicillin, ceftriaxone, and tetracycline (80%-100%), and lower resistance to gentamicin and levofloxacin (60%). In conclusion, E. coli was found in both dogs and veterinary clinic surfaces and exhibited resistance to numerous antibiotics. This study suggests that further research is necessary to identify the specific genes responsible for the antibiotic resistance of E. coli found in dogs, on clinic surfaces, as well as in humans -- including clinic technicians and dog owners -- in order to better understand how this resistance is affected by the transmission of E. coli between different carriers. [ABSTRACT FROM AUTHOR]