2.3 Necropsy Implementation
Must ensure the total death from the animal (pigeon)
before doing a necropsy. Necropsies stages were
performed such cleansing into the incised area by
rinsing using the water flow afterward, the fixation
and incision were made to see organ abnormalities.
The standard necropsy procedure was carried out
according to Majo and Dolz (2011). The purpose of
a necropsy is carried out to assist overall the
examination of organ abnormalities, for
macroscopic abnormalities examination, and also
sampling for the histopathological preparations.
2.4 Histopathology Preparation
Hematoxylin Eosin staining prep will be using the
samples from selected organs that assumed having
abnormalities in the pigeons, which are liver,
intestine, skin, and proventriculus (Janqueira, 2007).
3 RESULTS AND DISCUSSION
The results of the liver macroscopic examination
showed a color change into yellow in the right lobe
(Figure 1.) Microscopic examination showed the
inflammatory cell infiltrate in the portal triad
(Figure 2.) According to Lope et al. (2017), the liver
has a complex hemodynamic groove. Blood from
the spleen, pancreas, and gastrointestinal flows into
the liver through the portal vein along with the
hepatic arteries. The inflammation of inflammatory
cells is an excessive accumulation of cells in the
tissues or blood vessels. Portal triads consist of
venules portal, arterioles portal, and bile ducts.
Blood flow from the portal vein is blood flow that
comes from the intestine, spleen, and rectum so that
it contains numerous antigens residual of the
intestinal bacteria such as lipopolysaccharide
endotoxins (LPS) and leukocytes when there is
inflammation due to the infection process in these
organs (Bogdanos. et al. 2013).
Figure 1. Pigeon's liver that appears turned into yellow in
the right lobe on the macroscopic examination (blue
arrow).
Figure 2. Histopathology of pigeon's liver tissue by
Hematoxylin Eosin staining (400x). Annotation : A.
Infiltration of inflammatory cells near the central vein
(black arrow). Inflammation of inflammatory cells in the
triad's portal (inside the green ring.
Macroscopic observations of proventricular
organs show hyperemia. The proventriculus is
seemed to have a dark red color (Figure 3). The
proventricular disorder is an anomaly occurring in
specific cases such as Newcastle disease.
Pathognomonic lesions of ND disease characterized
by the presence of petechiae and hemorrhage in the
mucosa proventriculus (Nakamura et al. 2010).
There was no hemorrhage, and petechiae
founded in the mucosa in the pigeon's case, but it has
hyperemia. Microscopic results showed congestion,
mucous gland ulceration, and ruptured
proventricular gland (Figure 4). Congestion is a
vascular size enlarged. Congestion generally occurs
when there was an expansion in tissue activity,
increased acid levels, CO2, also an infection or
tissue damage. It is due to vasodilation, and
increased blood flows into the area. Increased blood
flows to the gastrointestinal commonly occur during
the metabolic process. Erosion is a superficial
damaged on the surface of the tissue that could be
occurred by inflammation, trauma, or parasites that
break the extent of the mucosa and does not reach
the muscular mucosa. Ulcers are local lesions on the
skin or mucosal layer that show damaged superficial
epithelium and also in deeper tissues. The histology
shows superficial damages that indicate the
occurrence of mucosal gland erosions, and the
damage also exists unto the (mucosal gland). The
proventriculus histopathology shows that the
damage has spread into the proventricular glands
(Figure 4).