Unusual case of pentastomiasis mimicking liver tumor

Machado, Marcel Autran; Makdissi, Fábio F.; Canedo, Leonardo Fernandes; Martino, Rodrigo; Crescentini, Fábio; Chieffi, Pedro Paulo; Bacchella, Telésforo

doi:10.1111/j.1440-1746.2006.03203.x

Cited by 24 publications

(18 citation statements)

References 8 publications

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“…Human nasopharyngeal infections may occur through consumption of raw or undercooked liver, lymph node, or other infected visceral organs, while the visceral form occurs through eating the eggs in contaminated water, vegetables, or fruits (El-Hassan et al 1991;Yagi et al 1996;Lazo et al 1999;Yao et al 2008;Tappe and Büttner 2009). Human linguatulosis is reported from various parts of the world such as Germany (Tappe et al 2006;Tappe and Buttner 2009), Italy (Pampiglione et al 2001), Michigan, USA (Gardiner et al 1984), North Carolina, USA (Baird et al 1988), Canada (Guardia et al 1991), Brazil (Machado et al 2006), Ecuador (Lazo et al 1999), China (Ma et al 2002;Yao et al 2008;Lai et al 2010), Turkey (Akyol et al 1995), Egypt (Morsy et al 1999), and Sudan (Yagi et al 1996). Yao et al (2008) showed that, compared to the nasopharyngeal form, the visceral form was more common and it accounted for 88.9% of the human pentastomiasis.…”

Section: Introductionmentioning

confidence: 94%

Prevalence, biology, pathology, and public health importance of linguatulosis of camel in Iran

Oryan

Khordadmehr

Ranjbar

2011

Trop Anim Health Prod

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Linguatula serrata is a cosmopolitan zoonotic parasite with its adult form occurring in the nasal and respiratory passages of canids as the definitive hosts, while its immature stages localize in the mesenteric lymph nodes, liver, spleen, lungs, and, rarely, in other organs, such as the ocular region of herbivorous intermediate hosts. Humans can behave as both intermediate and final host and are infected by visceral and nasopharyngeal linguatulosis. Consumption of infected, improperly cooked viscera of the intermediate hosts, including sheep, goats, cattle, camels, or other herbivores containing the larval stages of this parasite is a potential source of infection of human beings with the nasopharyngeal form of linguatulosis. However, nasopharyngeal secretions or feces of carnivores containing eggs of Linguatula are the main sources for infecting human beings with the visceral form of this infection. In the present study, the prevalence of infection by nymphs of L. serrata in 101 camels in Yazd Province, central Iran, was estimated based on histopathological studies of samples from two, apparently enlarged, mesenteric lymph nodes (MLN), together with one sample from a whitish pinpoint spot on the liver and spleen of each animal. Thirteen camels (12.9%) were infected with the nymphal stage of L. serrata. Age and sex did not play a significant role in the prevalence of this parasitic infection. The number of parasites in each MLN ranged from one to six larvae. In view of the consumption of raw or undercooked liver and visceral organs of camel by humans of this region, the importance of careful inspection at slaughter needs to be emphasized.

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Section: Introductionmentioning

confidence: 94%

Prevalence, biology, pathology, and public health importance of linguatulosis of camel in Iran

Oryan

Khordadmehr

Ranjbar

2011

Trop Anim Health Prod

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“…In Central and South America, sporadic cases have also been described [5]–[8]. The disease is rare in Europe, the United States, and China, where only a few cases have been reported [1], [9]–[13].…”

Section: Tutorialmentioning

confidence: 99%

“…If only a few parasites are present, L. serrata may mimic hepatic or pulmonary malignancy clinically and on radiological assessments. Patients may develop abdominal pain, chronic cough, or night sweats [1],[8],[12]. In heavy infections with Armillifer spp., death may occur due to secondary septicemia, pneumonia, or severe enterocolitis [11],[19].…”

Section: Tutorialmentioning

confidence: 99%

Diagnosis of Human Visceral Pentastomiasis

2009

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Visceral pentastomiasis in humans is caused by the larval stages (nymphs) of the arthropod-related tongue worms Linguatula serrata, Armillifer armillatus, A. moniliformis, A. grandis, and Porocephalus crotali. The majority of cases has been reported from Africa, Malaysia, and the Middle East, where visceral pentastomiasis may be an incidental finding in autopsies, and less often from China and Latin America. In Europe and North America, the disease is only rarely encountered in immigrants and long-term travelers, and the parasitic lesions may be confused with malignancies, leading to a delay in the correct diagnosis. Since clinical symptoms are variable and serological tests are not readily available, the diagnosis often relies on histopathological examinations. This laboratory symposium focuses on the diagnosis of this unusual parasitic disease and presents its risk factors and epidemiology.

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“…Once in the intestines of the intermediate, the eggs hatch into larvae, which migrate into other internal organs (particularly the liver) where they form cysts or granulomas. This can also occur in humans, even today (Machado et al 2006), even though the host may not be aware of the infection.…”

Section: Human Infectionmentioning

confidence: 99%

“…Reports of this nature in Africa usually refer to misidentified Armillifer species, while human infection in the Americas seems to be mediated by Linguatula serrata; e.g. Lazo et al (1999), Machado et al (2006), and references therein.…”

Section: Porocephalus Humboldt 1811mentioning

confidence: 99%