Anatomia e segmentação pulmonar de tamanduá-bandeira (Myrmecophaga tridactyla - Linnaeus, 1758) de vida livre

Giraldi, A.C.C.; Aires, Luiz Paulo Nogueira; Rodrigues, Rosangela; Cruvinel, T.M.A.; Melo, Alan Peres Ferraz de

doi:10.1590/1678-4162-9197

Cited by 6 publications

(7 citation statements)

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“…The same features are observed in dogs, cats, pigs (König & Liebich 2016), capybaras (Moreto et al 2017), coatis (Oliveira et al 2011), and giant anteaters. However, different from these animals, and similar to cattle, goats, and sheep, the cranial lobe of the right lung in Myrmecophaga tridactyla is divided into cranial and caudal parts, as described by Giraldi et al (2017).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, knowing the anatomy and physiology of this tract is of paramount importance for giant anteater's preservation and conservation (Lange et al 2013), since previous studies have evidenced some anatomical features specific of this species. However, only the macroscopy and pulmonary segmentation of these animals were evidenced in these studies (Giraldi et al 2017) therefore, there are some remaining gaps that still have to be approached in detail.…”

Section: Introductionmentioning

confidence: 99%

“…Airways and hematogenic pathway can become the viable access to toxins and microorganisms in case of accidents (López 2013, König & Liebich 2016). Yet, the detailed description of organs and tracts makes it easier to understand this species' behavior and evolution (Giraldi et al 2017) because it clarifies diagnostic and treatment questions, as well as favors species conservation (Sanders & Feijó 2007).…”

Section: Introductionmentioning

confidence: 99%

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Macroscopic and microscopic morphology of the trachea and lungs of giant anteater (Myrmecophaga tridactyla)

et al. 2020

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Giant anteater (Myrmecophaga tridactyla) is a wild mammal distributed in Central and South America; nowadays, it is classified as an endangered species. Research about the macroscopic and histomorphological aspects of its respiratory tract is scarce, and, sometimes, it limits the treatment provided to sick animals and impairs species preservation. Thus, the present study aims to describe the macroscopic and microscopic morphology of its lower respiratory tract, including trachea and lungs. To do so, 12 adult giant anteaters from “Centro de Triagem de Animais Silvestres de Goiânia” (CETAS-GO), Goiás State, Brazil, were used in the research after natural death or euthanasia. Three of these animals were used for macroscopic assessments; they were fixed in 10% buffered formalin and dissected. Trachea and lung tissue samples were collected from nine animals right after death and fixed in 10% buffered formalin for histomorphological analysis; they were processed, embedded in paraffin, and inked with hematoxylin-eosin (HE), periodic acid-Schiff (PAS), and Masson’s trichrome. The macroscopic analysis showed that the trachea in this species is proportionally short and presents from 19 to 27 tracheal cartilages. The right lung presents four lobes and the left one, two. The microscopic analysis evidenced respiratory epithelium of the ciliated cylindrical pseudostratified type, without evident goblet cells in the mucosa layer of the trachea and bronchi. The pulmonary visceral pleura is thick, similar to other large domestic mammals - complete septa extend from the pulmonary visceral pleura. In conclusion, the macroscopy and histomorphology of giant anteater’s lower respiratory tract, represented by trachea and lungs, are similar to that of other domestic and wild mammals. Pulmonary histomorphology is mainly similar to that of pigs and ruminants: it has thick visceral pleura that emits complete septa of conjunctive tissue, which enable lobular parenchymal architecture.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Macroscopic and microscopic morphology of the trachea and lungs of giant anteater (Myrmecophaga tridactyla)

et al. 2020

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“…The lower respiratory tract of the nine-banded armadillo follows the pattern of the Mammalia class, with great similarity to other Xenarthros. The lower respiratory tract has the same organization as the Giant Anteater (Giraldi et al, 2017) and the common sloth (Faro et al, 2015) consisting of a trachea that branches into bronchi and successively into bronchioles. In the nine-banded armadillo, the trachea is located at the end of the larynx, in the visceral space of the neck, starting at the mediastinum of the thoracic entrance until its terminal bifurcation in the region proximal to the heart, as well as in the trachea of excavator animals (Maina and Igbokwe, 2020).…”

Section: Discussionmentioning

confidence: 99%

Morphological features of lower respiratory tract of nine‐banded armadillo (Dasypus novemcinctus, Linnaeus, 1758)

Araújo

Barros

Cavalcante

et al. 2020

Anat Histol Embryol

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The nine‐banded armadillo (Dasypus novemcinctus) is a mammal of the Xenarthra Superorder, which inhabits Central, South and North America. Few morphological descriptions are observed in this species, including the respiratory tract; therefore, the objective of this study was to describe morphologically the lower respiratory tract of the nine‐banded armadillo. Five animals were dissected, and the macroscopic and microscopic aspects were analysed. In the anatomical analysis, the perfusion technique was performed with vinyl acetate and the fragments of tissue from respiratory organs (trachea, bronchi, bronchioles and pulmonary lobes) were stained with haematoxylin–eosin for visualization under optical microscopy. Containing about 30 cartilage rings, the trachea is lined internally with ciliated pseudostratified epithelial tissue. The lungs are subdivided into lobes by deep interlobar fissures, with two lobes in the right lung and three lobes in the left lung. Microscopically, the primary, secondary and tertiary bronchi have non‐ciliated pseudostratified epithelium with goblet cells. It was found that macro‐ and microscopically the respiratory tract of this species is similar to existing xenarthras and other excavator animals. These data provide subsidies for the clinic and preservation of this species.

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“…Porém atenta-se que esses indivíduos apresentam particularidades anatômicas que devem ser pontuadas, como a presença de um tórax mais alongado que cães e gatos, e por possuírem 17 vertebras torácicas e 17 costelas [11]. Não foram encontrados trabalhos que descrevessem a anatomia pulmonar de tamanduá-mirim, todavia, de acordo com um trabalho [6], para tamanduá-bandeira (Mymercophaga tridactyla) a lobação pulmonar apresentou-se semelhante à descrita para cães [7], a saber: quatro lobos no pulmão direito (cranial, médio, caudal e acessório) e dois no pulmão esquerdo (cranial e caudal).…”

Section: Discussionunclassified

Pneumotórax fechado em tamanduá mirim (Tamandua tetradactyla)

Piccoli

Santos²,

Pelvski³

et al. 2018

Acta Scientiae. Vet.

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Background: Pneumothorax is characterized by the accumulation of air in the pleural space, either due to trauma or secondary to other conditions. Typically, pneumothorax is correlated with blunt trauma of the pulmonary parenchyma or penetrating trauma of the thoracic cavity, such as on being trampled upon or bitten, respectively. The therapeutic approach of this condition is rarely described in wild animals; therefore, the present study aims to describe the clinical manifestations, diagnostic method, and therapeutic aproach in a specimen of Tamandua tetradactyla with closed pneumothorax received for emergency care after being hit by a vehicle.Case: A southern tamandua (T. tetradactyla) was received in our hospital after being hit by a vehicle. The patient presented with a state of stupor, nystagmus, a restrictive respiratory pattern, and muffling on auscultation of respiratory and cardiac sounds in the left antimer. Simultaneously with the physical examination, venous access was established, pain control was intravenously performed and oxygen therapy was started. After stabilization, the patient underwent abdominal ultrasound (abdominal-focused assessment with sonography for trauma) and thoracic radiographs. The abdominal ultrasound confirmed the presence of a small amount of free fluid in the evaluated recesses, i.e., hepatodiaphragmatic, splenorenal, cystocholic, and hepatorenal, suggesting the need for periodic ultrasonographic monitoring associated with the clinical evaluation of the patient because of suspicion of active hemorrhage. The thoracic radiographic image (ventrodorsal recumbency) revealed increased pulmonary opacity due to lobar retraction, marked by an enlarged gap between the pulmonary lobes and thoracic wall, and the formation of a radiolucent area between both structures. The lateral recumbency evidenced the dorsal displacement of the cardiac apex in relation to the sternum. In addition to the thoracic alterations, a transverse fracture in the middle third of the diaphysis of the left fibula was identified by radiographic examination. After extensive hair clipping and skin antisepsis of the left hemithorax, thoracentesis (an adapted technique from that used in domestic animals) was performed with access via the 8th intercostal space in its most dorsal presentation using a 21-gauge Butterfly needle attached to a three-way medical valve and 20-mL syringe. The procedure allowed 100 mL air to be drained until the negative pressure of the cavity was restored. At the end of the drainage, the patient showed a remarkable improvement in the respiratory pattern, and follow control radiographs showed full pulmonary expansion and no recurrence. The possibility of active abdominal hemorrhage was disregarded because ultrasound monitoring after 6 h revealed no change in the amount of free fluid in the suppressed recess.Discussion: Pneumothorax is an important condition that can be detected in injured domestic and wild animals that are run over. The association between a detailed clinical evaluation and radiographic examination was essential for the diagnosis and initiation of the appropriate therapy, contributing to the prognosis of the patient. The adaptation of the thoracocentesis technique used in domestic animals proved to be suitable for the treatment of this Tamandua tetradactyla.

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Anatomia e segmentação pulmonar de tamanduá-bandeira (Myrmecophaga tridactyla - Linnaeus, 1758) de vida livre

Cited by 6 publications

References 16 publications

Macroscopic and microscopic morphology of the trachea and lungs of giant anteater (Myrmecophaga tridactyla)

Macroscopic and microscopic morphology of the trachea and lungs of giant anteater (Myrmecophaga tridactyla)

Morphological features of lower respiratory tract of nine‐banded armadillo (Dasypus novemcinctus, Linnaeus, 1758)

Pneumotórax fechado em tamanduá mirim (Tamandua tetradactyla)

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