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.

Prevalence of Linguatula sp., a food-borne zoonotic aberrant arthropod, in river buffaloes slaughtered at Tabriz slaughterhouse, Iran

2020 ◽  
Author(s):  
Nasser Hajipour ◽  
Jennifer Ketzis ◽  
Parviz Hassanzadeh
Keyword(s):  
Infection Rate ◽  
Statistical Association ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Intensity Of Infection ◽  
Mesenteric Lymph ◽  
Food Borne ◽  
Different Seasons ◽  
Significant Statistical Association ◽  
Age And Sex

Abstract Background Canids and herbivores are the definitive and intermediate hosts of Linguatula sp., respectively. Methods Mesenteric lymph nodes (n=32 525) were randomly collected from 7585 buffaloes from July 2016 to July 2019 and examined macroscopically. Results Results showed that 388 (5.11%) buffaloes were infected. The intensity of infection was determined to be 3.07±0.07. Significant statistical association was identified between infection rate and age and sex. Although there were no significant differences in the infection rate over different seasons, the highest infection rate was observed in autumn. Conclusions These data highlight the importance of inspection at slaughter.

Prevalence of Linguatula serrata infection in domestic ruminants from Meshkin Shahr, Iran

2018 ◽  
Vol 68 (2) ◽  
pp. 175 ◽  
Author(s):  
Β. ESMAEILNEJAD ◽  
J. GHAREKHANI ◽  
H. REZAEI ◽  
M. GOLABI ◽  
N. MOLAYI
Keyword(s):  
Infection Rate ◽  
Age Groups ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Endemic Region ◽  
Linguatula Serrata ◽  
Cross Sectional ◽  
Domestic Ruminants ◽  
Significant Difference ◽  
Northwest Of Iran

Linguatula serrata is an aberrant cosmopolitan parasite, which inhabits the canine respiratory system (final host). The domestic ruminants such as sheep, goats, cattle and buffaloes (intermediate hosts) play the important role for transmission of parasite to humans and animals. The current investigation aimed to investigate the prevalence of L. serrata infection in domestic ruminants in Meshkin Shahr, Northwest of Iran. In cross-sectional study between March 2013 and March 2014, the mesenteric lymph nodes (MLNs) of 753 sheep, 403 goats, 657 cattle, and 341 buffaloes were sampled in Meshkin Shahr slaughterhouse, randomly. All of samples were examined for L. serrata infection using parasitology methods. The prevalence rate was reported 26.30% in goats, 18.32% in sheep, 14.30% in cattle, and 13.19% in buffaloes (P<0.05). In all animals, a significant difference were found between infection rate and different seasons (P<0.05), opposite to different age groups. Also, there was significant differences between infection rate and gender in cattle (P=0.024, OR=1.6) and buffaloes (P=0.034, OR=2), unlike to sheep and goats (P>0.05). This study was demonstrated of linguatulosis in domestic ruminants from Northwest of Iran for first time. According to our findings, Meshkin Shahr is a new endemic region for L. serrata infection in Iran. Since the linguatulosis is a zoonotic parasitic disease, preventive measures to break the parasite’s life cycle and reduce the risk of infection in humans and animals is highly recommended.

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 infection among dogs (definitive host) and domestic ruminants (intermediate host) in the North West of Iran

2011 ◽  
Vol 56 (No. 11) ◽  
pp. 561-567 ◽  
Author(s):  
F. Rezaei ◽  
M. Tavassoli ◽  
A. Mahmoudian
Keyword(s):  
Infection Rate ◽  
Age Groups ◽  
High Rate ◽  
Upper Respiratory Tract ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Linguatula Serrata ◽  
North West ◽  
The North ◽  
Domestic Ruminants

&nbsp;Linguatula serrata is a zoonotic parasite causing visceral and nasopharyngeal linguatulosis in humans. Dog and other canines are the main definitive hosts while most herbivores, including ruminants serve as intermediate hosts for linguatulosis. Human rarely become infected as both final and intermediate hosts. This survey aimed to assess the L. serrata infection rate of dogs and domestic ruminants in North West of Iran. The upper respiratory tract of 97 dogs including 45 females and 52 males and the mesenteric lymph nodes (MLNs) of 396&nbsp;goats (203&nbsp;females and 193 males), 406 buffaloes (166 females and 240 males), 421 cattle (209 females and 212 males) and 438 sheep (223 females and 215 males) were examined for L. serrata. Animals were categorized into four age groups, including under six months, six to 24 months, two to four years and more than four years. Results showed that 27.83% of dogs were infected with L .serrata. The infection rate for goats, buffaloes, cattle and sheep was 50.75%, 26.6%, 36.62% and 42.69%, respectively. The prevalence rate in all animals was significantly associated with age and sex (P &le; 0.05). In ruminants, the highest infection rate was found in goats (P &le; 0.05). The results from this study indicate a high rate of infection in dogs and domestic ruminants, suggesting a potential high risk of zoonotic infection in man in the investigated area. &nbsp;

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.

Tissue cyst tropism in Toxoplasma gondii: a comparison of tissue cyst formation in organs of cats, and rodents fed oocysts

Parasitology ◽  
1997 ◽  
Vol 115 (1) ◽  
pp. 15-20 ◽  
Author(s):  
J. P. DUBEY
Keyword(s):  
Toxoplasma Gondii ◽  
Cyst Formation ◽  
Tissue Cyst ◽  
Intermediate Hosts ◽  
Mesenteric Lymph Nodes ◽  
Marked Contrast ◽  
Mesenteric Lymph ◽  
Time Period ◽  
Rats And Mice ◽  
The Brain

The persistence of Toxoplasma gondii tissue cysts in organs of cats (definitive host) and rodents (intermediate hosts) was studied. Nine cats, 12 rats, and 12 mice were fed T. gondii oocysts and their organs were digested in pepsin and then bioassayed for bradyzoites in mice. Of 9 cats killed 37 or 51 days after feeding 102 (2 cats), 103 (3 cats) or 104 (4 cats) oocysts of the VEG strain, tissue cysts were found in each cat; in the tongue of 9, in the heart of 5, in the brain of 4, and in the eyes of 1 cat. The dose had no effect on the distribution of tissue cysts in cats. Twelve rats were each fed 105 oocysts of the VEG strain of T. gondii and killed 21, 29, 64 or 237 days later. At each time-period, 11 tissues of 3 rats were pooled and bioassayed in mice. Tissue cysts were found in the brain, skeletal muscle, heart and kidneys of rats at each killing time; in the lungs, intestines, and mesenteric lymph nodes in 3 of 4 instances; in the tongue, liver, and eyes in 2 instances and in the spleen in 1 instance. Also, using the same procedures and sampling the same 11 tissues as used for rats, tissue cysts were seen in all organs except in the tongue and liver of 3 mice killed on day 82 after feeding the VEG strain. In 9 mice (3 with each strain) fed oocysts of the ME-49, GT-1, or P89 T. gondii strain and killed 62–130 days later, tissue cysts were found consistently only in the brain. Thus, in rats and mice, most tissue cysts were found in the brain and rarely in the tongue. This was in marked contrast to the distribution of tissue cysts in cats.

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