Filarioid nematodes in cattle, sheep and horses in Finland

Solismaa, Milla; Laaksonen, Sauli; Nylund, Minna; Pitkänen, Elisa; Airakorpi, Riitta; Oksanen, Antti

doi:10.1186/1751-0147-50-20

Cited by 22 publications

(22 citation statements)

References 18 publications

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“…Multifocal area of accumulation of macrophages and fibroblasts were found in the wall of aorta and ligamentum nuchae. This finding was supported by the findings of Solismaa et al (2008) and Kmnenou et al (2002) who reported mild to intense infiltration with eosinophilic granulocytes and multifocal nodular lymphoplasmacytic aggregations in aorta. There were granulomatous lesions with central necrotic tissue and cell detritus surrounded by eosinophilic granulocytes, lymphocytes, plasma cells and histiocytes and some multinucleated giant cells (Figure 4 A-D).…”

Section: Gross and Histopathological Changessupporting

confidence: 77%

Epidemiology and pathology of onchocercosis of cattle in Bangladesh

et al. 2015

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Onchocercosis is a parasitic disease caused by the different species of nematodes belonging to the genus Ochocerca affecting both humans and animals. Ochocerca armillta, O. gutturosa and O. gibsoni affect mainly cattle, and also buffaloes. Here, we studied epidemio-pathology and vector flies of onchocercosis in cattle in Bangladesh. Out of 310 animals examined, 163 (52.6%) were infected with different species of Onchocerca. Three species of Onchocerca, namely, Onchocerca armillata (24.8%), Onchocerca gutturosa (24.7%) and Onchocerca gibsoni (13.3%) were identified. We recovered O. armillata only from aorta, O. gutturosa from the ligamentum nuchae and O. gibsoni from the subcutaneous nodules. Nodular lesions were detected at the neck (49/20.9%), abdomen (5/2.1%), flank (8/3.4%), brisket (33/14.0%) and thigh/legs (32/13.6%) regions. We observed age as a potential diterminant in the occurance of the infection. Prevalence of O. armillata and O. gutturosa was significantly higher in older animals (> 4 years) than yearlings (1-2 years). Sex, breed and rearing system did not significantly influence the prevalence of bovine onchocercosis. Our study revealed that seasons of the year was another important determinant for onchocercosis, and prevalence was the highest in the summer. Grossly, the affected aorta was thickened, dilated and with elevated intima. Histological examination revealed parasitic granuloma present in blood vessels characterized by the infiltration of eosinophils and neumerous sections of the parasites. We identified only Culicoides spp., but no Simulium spp., as a vector from the study area. Vector flies were the most abundant in the early morning and least at noon, and mostly at the umbilical region of cattle. Culicoides spp. were most abundant in the winter. Our results suggest that occurrence of onchocercosis is fairly high in cattle in Bangladesh irrespective to age, sex, breed and management.Progressive Agriculture 26 (2): 147-154, 2015

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Section: Gross and Histopathological Changessupporting

confidence: 77%

Epidemiology and pathology of onchocercosis of cattle in Bangladesh

et al. 2015

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“…38 Onchocerca adults can live in the connective tissues of sheep and goats, where they induce nodules. can parasitize sheep and goats, although relatively few reports of the condition are available.…”

Section: Onchocerca Spp Infestationmentioning

confidence: 99%

Diseases of the Integumentary System

Roberson¹,

Baird²,

Pugh³

2012

Sheep and Goat Medicine

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“…These studies have revealed an array of Filarioid nematodes and associated diseases that appear to be emerging in northern ungulates Nikander et al 2007;Solismaa et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Setaria tundra microfilariae in reindeer and other cervids in Finland

et al. 2008

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Harmful parasites of the wild northern boreal mammals are still surprisingly poorly studied. In 2003-2006, a peritonitis outbreak caused by the filarioid nematode, Setaria tundra, emerged in Finland's reindeer population. In order to gain knowledge about the basic biology, epidemiology, and transmission dynamics of this parasite, samples for S. tundra were collected from reindeer and other cervids during the follow-up period 2004-2006. Using morphology and molecular biology methods, we describe here S. tundra's first larval stage, microfilaria (smf), for the first time scientifically. The prevalence and densities of smf were higher in reindeer calves than in adults, overall prevalence being 42%. The overall smf prevalences for moose, wild forest reindeer and roe deer were 1.4-1.8%, 23%, and 39%, respectively. The focus of microfilaremia moved north and settled down in the south simultaneously with the peritonitis outbreak. The peak microfilaremia occurred in the first summer after the infection, and smf disappeared from the blood after 2 years. Captive reindeer were smf positive over the year. The prepatent period of S. tundra was estimated to be about 4 months, and the life span at least 14 months. This parasite likely has an important impact on boreal ecosystems.

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Filarioid nematodes in cattle, sheep and horses in Finland

Cited by 22 publications

References 18 publications

Epidemiology and pathology of onchocercosis of cattle in Bangladesh

Epidemiology and pathology of onchocercosis of cattle in Bangladesh

Diseases of the Integumentary System

Setaria tundra microfilariae in reindeer and other cervids in Finland

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