Histopathological changes caused by the nymph stage of Linguatula serrata in the mesenteric lymph nodes of goats

2013 ◽  
Vol 61 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Mohammad Yakhchali ◽  
Ali Tehrani
Keyword(s):  
Lymph Nodes ◽  
Human Infection ◽  
Histopathological Changes ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Linguatula Serrata ◽  
Vascular Abnormality ◽  
Nymphal Stage ◽  
Mesenteric Lymph ◽  
Main Factor

Linguatula serrata (Fröhlich, 1789) is a ubiquitous parasite species belonging to pentastomids, which has been reported frequently from domestic herbivores of Iran. This study was carried out to elucidate the pathological changes caused by the nymphal stage of L. serrata in the mesenteric lymph nodes (MLNs) of goats. Jejunal and ileal MLNs of slaughtered goats infected with L. serrata were collected and fixed in 10% neutral formal saline. Histopathological changes included follicular necrosis accompanied by a loss of lymphocytes and oedematous cystlike spaces. Granulomatous lesions were formed by mononuclear cell infiltration and necrotic tissue. Some lymphocytes were apoptotic with chromatolysis. A more frequent vascular abnormality was vasculitis. These findings show that larval migration is the main factor to initiate trauma and cause irritation in the MLNs of goats. Since goats are habitual intermediate hosts in Iran, rigorous inspection of the MLNs of slaughtered goats is recommended in order to decrease the chance of human infection through the consumption of raw visceral organs of goats.

scholarly journals Infection and pathological lesions of lymph nodes induced by Linguatula serrata nymphs in one-humped camels in Iran

2018 ◽  
Vol 68 (4) ◽  
pp. 529 ◽  
Author(s):  
M. TAVASSOLI ◽  
R. HOBBENAGHI ◽  
A. KARGOZARI ◽  
H. REZAEIA
Keyword(s):  
Lymph Nodes ◽  
Giant Cells ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Granulomatous Reaction ◽  
Linguatula Serrata ◽  
Mesenteric Lymph ◽  
Zoonotic Parasite ◽  
Macroscopic Examination ◽  
Very High

Linguatula serrata (Pentastomida: Linguatulidae) known tong-worm is a cosmopolitan, zoonotic, and obligate endoparasite. The parasite lives in the nasopharyngeal region of the final hosts, which primarily include dogs and other carnivores. Various herbivores, including, camels serve as the best intermediate hosts for nymph stages. In present study the mesenteric lymph nodes of 101camels were examined for infection to L. serrata macroscopically and histopathologically. The infected and normal lymph nodes were processed for histopathology. The results indicated that out of 101 sampled 33 (32.67%) were infected. Macroscopic examination revealed that the infected lymph nodes are swollen and dark, with rubbery consistency, some with subcapsular hemorrhage on cutting. Extensive hemorrhage occurred in various parts of infected lymph nodes. A section of L. serrata parasite was observed near one of the hemorrhage centers. Neutrophil count was very high in these centers and giant cells were present around the parasite, indicating granulomatous reaction. Our findings confirmed that different regions of Iran is an endemic for L. serrata infections. Because L. serrata is a zoonotic parasite, preventive measures should be adopted to disrupt the parasite’s life cycle and minimize the risk of infection in both humans and other animals.

scholarly journals Prevalence of Linguatula serrata nymphs in slaughtered sheep from Tehran province, Iran

2019 ◽  
Vol 22 (4) ◽  
pp. 487-492
Author(s):  
S. Bokaie ◽  
A. Khanjari ◽  
M.-H. Rabiee ◽  
B. Hajimohammadi ◽  
S. Shirali ◽  
...  
Keyword(s):  
Infection Rate ◽  
Random Sampling ◽  
Preventive Measures ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Linguatula Serrata ◽  
Systematic Random Sampling ◽  
Mesenteric Lymph ◽  
Important Intermediate ◽  
Tehran Province

Linguatulosis is a zoonotic disease caused by Linguatula serrata. Ruminants are the most important intermediate hosts of this parasite. This study was carried out to evaluate the prevalence rate of Linguatula serrata infection in slaughtered sheep in slaughterhouses of Tehran province, Iran. A total of 767 slaughtered sheep were selected in 2016 using systematic random sampling and their mesenteric lymph nodes were examined for Linguatula serrata nymph detection. Then, the infection rate and its intensity in different ages, sex and seasons were assessed. It was revealed that 66 sheep (8.6%) were infected with Linguatula serrata nymphs. Intensity of the infection was 4.88 nymphs. The highest rate of infection was observed in sheep aged over 19 months (P≤0.05). The highest infection rate and intensity of the infection were recorded in winter and summer, respectively (P≤0.05). Besides, intensity of the infection in females was significantly higher than that in males (P≤0.05). This study indicates the importance of Linguatula serrata infection in sheep in Tehran province, and the need to improve preventive measures for reducing the rate of infection and preventing transmission of the infection from sheep and other ruminant to other animals and humans in Iran.

scholarly journals Histopathological Changes in Grossly Normal Caprine Mesenteric Lymph Nodes

2015 ◽  
Vol 4 (1) ◽  
pp. 53-56
Author(s):  
Shailesh Kumar Patel ◽  
Katherukamem Rajukumar ◽  
Rakesh Kumar ◽  
Balena Venkata Ram Reddy ◽  
Rajendra singh ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Histopathological Changes ◽  
Mesenteric Lymph Nodes ◽  
Mesenteric Lymph

Massive Visceral Pentastomiasis Caused by Porocephalus crotali in a Dog

2009 ◽  
Vol 46 (3) ◽  
pp. 460-463 ◽  
Author(s):  
M. D. Brookins ◽  
J. F. X. Wellehan ◽  
J. F. Roberts ◽  
K. Allison ◽  
S. S. Curran ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Lymph Nodes ◽  
18S Rrna ◽  
Reference Sequence ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Chain Reaction ◽  
Mesenteric Lymph ◽  
Pcr Product ◽  
Polymerase Chain

The testes of a 5-year-old, male, crossbred Schnauzer dog were the indicator organs for detection of massive pentastomiasis. Necropsy revealed numerous additional encysted parasites within the mesenteric lymph nodes, omentum, liver, sub-serosa of the small and large intestines, mesentery, and lungs. The nymphs had a pseudosegmented body, containing large eosinophilic glands and a chitinous cuticle with characteristic pores. Their hook configuration was consistent with that of Porocephalus. A pentastomid-specific 18S rRNA polymerase chain reaction (PCR) was designed and used to amplify template for sequencing. The sequence of the PCR product was 99.7% homologous with the reference sequence for P. crotali. This pentastomid parasite has been reported in North American snakes of genera Crotalus and Agkistrodon. Mammals are intermediate hosts, and snakes are the definitive hosts. Porocephalus crotali has been reported in dogs only once, and molecular methods have not been used previously to identify the species in clinical pentastomiasis.

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