3.2| PATHOLOGICAL AND CYTOLOGICAL FINDINGS
Among all of the necropsied animals (n = 11), seven with previous
history of abomasal bloat presented mainly gastrointestinal findings
with dehydration, pale mucosa, ascites (reddish content), abomasal and
intestinal (mainly caecum) meteorism and congestion, emphysematous
abomasitis (some with ruptures and abomasal content in the cavity),
blood clots inside the left ventricle, renal congestion and cranial
areas of lung consolidation (Figure 2). The other four with no history
of abomasal bloat presented mainly respiratory findings with
dehydration, pulmonary consolidation and edema, pleuritis, foam in the
airways, and blood clots inside left ventricle. The two groups are
separated in Table 2 in order to verify results from other complementary
findings.
Through all staining techniques (GIEMSA, Quick Panoticâ„¢ and Gram)
prepared for cytological evaluations of the direct impressions from the
abomasum, it was possible to identify, in different quantities: (a) Gram
positive bacteria, coccoid, with a cuboid shape suggestive of C.
ventriculi ; (b) Gram positive bacilli, forming oval-subterminal spores
suggestive of C. perfringens ; (c) round to ovoid
basophilic yeasts compatible with S. cerevisiae ; and (d) a scarce
population of small basophilic bacilli and streptobacilli (Figure 3;
Table 2).
The main histopathological findings from the kid goats with history of
abomasal bloat (n = 7) and gastroenteritis characterized by necropsy
were: cholangiohepatitis, nephrosis, emphysematous abomasitis (hyaline
necrosis and emphysema in the abomasal wall), intestinal hyaline
necrosis, thromboembolism, pulmonary edema, and non-purulent pneumonia
characterizing a systemic enterotoxemia picture. From the kid goats
without abomasal bloat signs (n = 4; control group) and respiratory
findings characterized by necropsy, it were found: purulent
bronchopneumonia, nephrosis, and intestinal hyaline necrosis featuring a
mixed picture of mannheimiosis and enterotoxemia (Table 2).