Experimental procedures In order to evaluate the blood leukocyte and glucose levels of C. callosus infected with P. brasiliensis, the animals https://www.selleckchem.com/products/mk-5108-vx-689.html were i.p. injected followed by macroscopic and microscopic evaluations done at days 7, 15, 30, 45, 60, and 75 post infection (three to four animals were analyzed

per group at each time point of infection). The organs showing macroscopic lesions were selected for further analysis. Control groups consisted of three animals per time point C59 wnt research buy inoculated with sterile saline. To determine the role of estrogen during P. brasiliensis infection, an additional C. callosus group (seventy animals) was subdivided into two sets: one being bilaterally click here ovarectomized (31 animals) and the other sham-operated (39 animals). Forty days after surgery, all animals were inoculated in the peritoneum with 1 × 106 viable infective forms of P. brasiliensis. An additional control group consisting of non-operated and non-infected animals (5 animals per

time point) received only saline injection. Histology On days 15, 45, 60, and 75 of infection, two to three animals from each group were sacrificed, grossly inspected, and fragments of mesentery, liver, spleen, pancreas, and lungs were collected and fixed in 10% formaldehyde. Representative sections from each organ were embedded in paraffin, processed and stained with haematoxilin-eosin (HE). Quantification of the lesion extensions was determined using a computer-aided densitometric software (OPTIMAS Bioscan Inc. WA, acetylcholine USA). For each organ, five slides with tissue sections were entirely evaluated. The number and area of the granulomas were determined, and the extent of tissue section occupied by the lesion was calculated by dividing the area occupied with lesions by the total area of the organ. Leukocyte counts and glucose levels Blood samples for leukocyte counts or glucose determinations were withdrawn from the retro-orbital plexus. Leucocytes were counted in a haemocytometer and the results were reported

as number of leukocytes per mL of blood. Serum glucose levels were determined by the method of Trinder [18] and reported as mg/dL. Results PB01 infection in Calomys callosus Gross inspection of C. callosus i.p. infected with 106 yeast forms of PB01 revealed peritonitis characterized by the presence of exudates containing a large number of yeast cells. Adherence involving several parts of mesentery and spleen was also observed. These signs increased in intensity with time from injection of the fungus until the infection turned to the chronic phase (sixty days post infection). Following the acute phase of the inflammatory reaction, the infection became circumscribed due to granuloma formation in the peritoneal cavity as well as in several distant organs such as the liver, spleen, lungs, and pancreas.