Incidence of Linguatula serrata nymphs and pathological lesions of mesenteric lymph nodes in cattle from Urmia, Iran

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.

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The effect of feeding pigs on food naturally contaminated with salmonellae

Epidemiology and Infection ◽

10.1017/s0022172400038523 ◽

1960 ◽

Vol 58 (4) ◽

pp. 381-389 ◽

Cited By ~ 28

Author(s):

H. Williams Smith

Keyword(s):

Public Health ◽

Lymph Nodes ◽

Muscular Tissue ◽

Mesenteric Lymph Nodes ◽

Internal Organs ◽

Pathological Lesions ◽

Mesenteric Lymph ◽

Contaminated Food ◽

Short Time ◽

Effect Of Feeding

1. The course of events following the feeding of salmonella-free pigs on food naturally contaminated with salmonellae has been followed. The pigs were killed at varying times after the commencement of the experiment and their organs examined for salmonellae.2. None of the pigs showed any signs of ill-health and no pathological lesions were observed in them when they were killed. Salmonellae were found, however, in very small numbers in the mesenteric lymph nodes of some of them but not in any of their other internal organs or in their muscular tissue. The longer the pigs were fed on the contaminated food the more likely were their mesenteric lymph nodes to be infected.3. Salmonellae were isolated from time to time from the faeces of the pigs but there was no suggestion of any of the pigs becoming permanent faecal excreters of these organisms.4. Six pigs were retained for a short time after the use of the contaminated food was discontinued. Salmonellae were never found in their faeces and when they were killed the mesenteric lymph nodes of only one of them was found to be infected.5. The results are discussed from the agricultural and public health viewpoints.

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Infection rates of Linguatula serrata nymphs in mesenteric lymph nodes from water buffaloes in North India

Veterinary Parasitology ◽

10.1016/j.vetpar.2014.07.025 ◽

2014 ◽

Vol 205 (1-2) ◽

pp. 408-411 ◽

Cited By ~ 6

Author(s):

Vikrant Sudan ◽

Amit Kumar Jaiswal ◽

Daya Shanker

Keyword(s):

Lymph Nodes ◽

North India ◽

Infection Rates ◽

Mesenteric Lymph Nodes ◽

Linguatula Serrata ◽

Water Buffaloes ◽

Mesenteric Lymph

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The Prevalence of Linguatula serrata Nymphs in Mesenteric Lymph Nodes in Cattle

American Journal of Animal and Veterinary Sciences ◽

10.3844/ajavsp.2010.155.158 ◽

2010 ◽

Vol 5 (2) ◽

pp. 155-158 ◽

Cited By ~ 14

Author(s):

Fard

Keyword(s):

Lymph Nodes ◽

Mesenteric Lymph Nodes ◽

Linguatula Serrata ◽

Mesenteric Lymph

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Parasitological and Pathological Investigations on Linguatula serrata nymphs in Mesenteric Lymph Nodes in Sheep In Konya Region in Turkey

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v2i5.224-227.164 ◽

2014 ◽

Vol 2 (5) ◽

pp. 224 ◽

Cited By ~ 2

Author(s):

Osman Selçuk Aldemir ◽

Meral Aydenizöz ◽

Özlem Ateşoğlu

Keyword(s):

Lymph Nodes ◽

Mononuclear Cells ◽

Pathological Findings ◽

Mesenteric Lymph Nodes ◽

Linguatula Serrata ◽

Mesenteric Lymph ◽

Yellowish White

In this study was aimed to investigate spread and pathological findings of Linguatula serrata nymphs in mesenteric lymph nodes (MLNs) in sheep. A total of 1000 MLNs from 140 sheep (125 male and 15 female) were collected from a commercial (Konet) abattoir. Fourteen of 140 sheep (10%) were infested with nymph stages of L. serrata.Infested lymph nodes were swollen, firm, edematous, many yellowish-white pinpoint and with congestion. In histopathological examinations, these nodules were consist of one or more nymphal stages of L. serrata and these were surrounded by infiltration mononuclear cells and neutrophyl leucocyte. Lymphoid follicules were hyperplastic and sinus catarrh was also observed in medulla.

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

Acta Veterinaria Hungarica ◽

10.1556/avet.2012.056 ◽

2013 ◽

Vol 61 (1) ◽

pp. 36-41 ◽

Cited By ~ 4

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.

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