In order to investigate the morphological characteristics of epididymal duct of the squirrel, the histological and histochemical studies were carried out. The epididymal duct can be divided into 9 segments by histological and histochemical features. Segments 1 to 5 were located in the head, segments 6 and 7 in the body, and segments 8 and 9 in the tail of the epididymis. The apical cells were numerous in the segment. Clear cells which has a compact, deeply staining nucleus and a characteristically clear cytoplasm were scattered in the epithelium throughout the duct. Interepithelial clear cells which had PAS-positive granules tended to increase in number caudally. Strong PAS-positive reaction was detected at the intralumen of the segments 3, 8 and 9. Acid phosphatase activity was relatively high in the basal cytoplasm of the segment 7, and then in the supranuclear region of the segments 8 and 9. Alkaline phosphatase activity was weakly positive or negative except the segments 3 and 4. ATPase activity was strong in the free surface of the epithelium in the head and the entire cytoplasm in the body and tail, and SDH activity was generally weak except for the body where it was more intense.

The present study was aimed to know the chronic hepatitis with abdominal effusion in a beagle dog and its therapeutic management. A 2.5 year old male beagle was presented to Madras Veterinary College teaching Hospital, madras veterinary college, Chennai with the history of inappetence, abdominal distension for past 10 days and the clinical signs of inappetence, fever and palpablelymph node and congested mucous membrane. On Physical examination, dog showed respiratory distress and dull. Dog was subjected for radiography examination, haematology, biochemistry parameters and ultrasound examination. On first day of examination, dog was treated with Lasix at the dose rate of 3 mg/kg body weight, antibiotics and Tribivet injection. Hematology and biochemical values revealed neutrophilia, elevated alkaline phosphatase, total bilirubin, direct bilirubin, and decreased total protein and albumin. The lateral view radiography of abdomen revealed fluid shadow and ultrasound examination revealed that chronic hepatitis with moderate abdominal effusion. In case of clinical suspicion of hepatitis an ultrasonographic liver scan can be of diagnostic aid and the finding of an altered structure can be indicative of a liver problem. In many cases of chronic hepatitis may not be associated with ultrasound abnormalities but ascites can be easily identified. Dog was treated with antibiotic cefotaxime at the dose rate of 25 mg/Kg body weight and Lasix at the dose rate of 3 mg/Kg body weight with liver supplement of Lysibin which contain silymarin and supplement with Astymin syrup for 3 weeks. The animal was reviewed after three weeks of treatment which was subjected for haeamtology, biochemistry and ultrasound examination which revealed there was improvement in the blood parameters with decreased total protein and normal level of Alkaline phosphatase and bilirubin level and ultrasound examination revealed normal study of abdominal effusion and liver echogenicity and dog had normal  appetite and normal  vital parameters. In this case hepatitis may be due to any viral etiology like adenovirus that may cause hepatitis with effusion that may be respond to treatment and diuretics and brought normal parameters of vital in dog. Chronic hepatitis with effusion may be further confirmed by Liver biopsy and molecular diagnosis.

The present study was aimed to know the chronic hepatitis with abdominal effusion in a beagle dog and its therapeutic management. A 2.5 year old male beagle was presented to Madras Veterinary College teaching Hospital, madras veterinary college, Chennai with the history of inappetence, abdominal distension for past 10 days and the clinical signs of inappetence, fever and palpablelymph node and congested mucous membrane. On Physical examination, dog showed respiratory distress and dull. Dog was subjected for radiography examination, haematology, biochemistry parameters and ultrasound examination. On first day of examination, dog was treated with Lasix at the dose rate of 3 mg/kg body weight, antibiotics and Tribivet injection. Hematology and biochemical values revealed neutrophilia, elevated alkaline phosphatase, total bilirubin, direct bilirubin, and decreased total protein and albumin. The lateral view radiography of abdomen revealed fluid shadow and ultrasound examination revealed that chronic hepatitis with moderate abdominal effusion. In case of clinical suspicion of hepatitis an ultrasonographic liver scan can be of diagnostic aid and the finding of an altered structure can be indicative of a liver problem. In many cases of chronic hepatitis may not be associated with ultrasound abnormalities but ascites can be easily identified. Dog was treated with antibiotic cefotaxime at the dose rate of 25 mg/Kg body weight and Lasix at the dose rate of 3 mg/Kg body weight with liver supplement of Lysibin which contain silymarin and supplement with Astymin syrup for 3 weeks. The animal was reviewed after three weeks of treatment which was subjected for haeamtology, biochemistry and ultrasound examination which revealed there was improvement in the blood parameters with decreased total protein and normal level of Alkaline phosphatase and bilirubin level and ultrasound examination revealed normal study of abdominal effusion and liver echogenicity and dog had normal  appetite and normal  vital parameters. In this case hepatitis may be due to any viral etiology like adenovirus that may cause hepatitis with effusion that may be respond to treatment and diuretics and brought normal parameters of vital in dog. Chronic hepatitis with effusion may be further confirmed by Liver biopsy and molecular diagnosis.

OBJECTIVE To determine the safety and pharmacokinetics of various doses of plant-derived cannabidiol (CBD) versus placebo following repeated oral administration. ANIMALS 20 healthy adult Beagles. PROCEDURES In a randomized, blinded, placebo-controlled trial, dogs were randomized to 5 groups balanced in body weight and sex (n = 4 dogs/group) and received a CBD (1, 2, 4, or 12 mg/kg; from cannabis extract) or placebo oil formulation PO once daily for 28 days. Outcome variables were assessed through daily health observations, veterinary examinations, CBC, and serum biochemical analysis. Blood samples were collected at various time points to estimate 24-hour pharmacokinetic profiles of CBD and selected metabolites (7-carboxy-CBD and 7-hydroxy-CBD). RESULTS Repeated CBD administration was well tolerated by dogs, with no clinically important changes in measured safety outcomes. Veterinary examinations revealed no clinically important abnormal findings. Adverse events were mild in severity. Relative to placebo administration, CBD administration at 12 mg/kg/d resulted in more gastrointestinal adverse events (mainly hypersalivation) and significantly higher serum alkaline phosphatase activity. Total systemic exposure to CBD increased on a dose-dependent basis following both acute (first dose) and chronic (28 days) administration. Within each CBD dose group, repeated administration increased total systemic exposure to CBD 1.6- to 3.3-fold. The 24-hour trough plasma CBD concentrations were also dose dependent, with a steady state reached following 2 weeks of administration. CONCLUSIONS AND CLINICAL RELEVANCE Repeated, daily oral administration of the CBD formulation led to dose-dependent increases in total systemic exposure to CBD and 24-hour trough plasma concentrations in healthy dogs. These findings could help guide dose selection.

OBJECTIVE To characterize the biochemical, functional, and histopathologic changes associated with lomustine-induced liver injury in dogs. ANIMALS I0 healthy purpose-bred sexually intact female hounds. PROCEDURES Dogs were randomly assigned to receive lomustine (approx 75 mg/m2, PO, q 21 d for 5 doses) alone (n = 5) or with prednisone (approx 1.5 mg/kg, PO, q 24 h for 12 weeks; 5). For each dog, a CBC, serum biochemical analysis, liver function testing, urinalysis, and ultrasonographic examination of the liver with acquisition of liver biopsy specimens were performed before and at predetermined times during and after lomustine administration. Results were compared between dogs that did and did not receive prednisone. RESULTS 7 of the I0 dogs developed clinical signs of liver failure. For all dogs, serum alanine aminotransferase (ALT) and alkaline phosphatase (ALP) activities, bile acid concentrations, and liver histologic score increased and hepatic reduced glutathione content decreased over time. Peak serum ALT (r = 0.79) and ALP (r = 0.90) activities and bile acid concentration (r = 0.68) were positively correlated with the final histologic score. Prednisone did not appear to have a protective effect on histologic score. CONCLUSIONS AND CLINICAL RELEVANCE In dogs, liver enzyme activities, particularly ALT and ALP activities, should be closely monitored during lomustine treatment and acute increases in those activities may warrant discontinuation of lomustine to mitigate liver injury. Nonspecific ultrasonographic findings and abnormal increases in liver function tests were not detected until the onset of clinical liver failure. Glutathione depletion may have a role in lomustine-induced hepatopathy and warrants further investigation.

The present study describes the serum biochemical alterations and histopathological abnormalities in the liver tissue of dogs with liver disease. A survey of hepatic lesions was conducted using ultrasound-guided percutaneous needle biopsies. The hematologic and biochemical changes in dogs with liver lesions were recorded. Chronic hepatitis was the most common liver histopathologic finding (37.9%). Other common findings included liver fibrosis (19.5%), vacuolar hepatopathy (10.3%), cholangiohepatitis (9.2%), hepatocellular carcinoma (4.6%), cholangitis (3.4%), cholangiocarcinoma (2.3%), and congestive hepatopathy (2.3%). Greater than 2-fold elevation of serum alanine aminotransferase (ALT) was a useful indicator, with a sensitivity of 40% to 65% for diagnosing all liver pathologies. Greater than 2-fold elevation of serum alkaline phosphatase (ALP) without significant elevation of ALT was useful for diagnosing liver diseases affected by inflammatory or regressive changes (sensitivity of 40% to 50%). Elevation of ALT, ALP, or a combination of ALT and ALP had a high sensitivity of up to 90% for identifying dogs with liver pathology. Hepatic injury and cholestasis enzymes should be interpreted together with patient history, clinical signs, and liver ultrasonographic appearance before performing a liver biopsy.