Dirofilariasis of the breast: sonographic appearance

Dirofilariasis of Breast Mimicking Malignancy - A Rare Entity

Human dirofilarial infection usually presents as pulmonary coin lesion or as subcutaneous nodule. We report the case of a 60-year-old female presented clinically with swelling in the lower-outer quadrant of the right breast for 2 weeks. Ultrasound reported as atypical lesion suggest fine-needle aspiration cytology (FNAC) correlation and follow-up. Clinical examination - subcutaneous nodule of size 2 cm × 2 cm presents in the lower-outer quadrant. Clinical suspicious of carcinoma was considered and FNAC was done. Aspirated pus-like material and adult worm about 4 cm in length were attached to the needle. Smear was air-dried and stained with Giemsa. Smears were cellular and showed numerous neutrophils, eosinophils, and a few histiocytes in a necrotic background and also noted coiled adult dirofilarial worm. Cellblock was prepared and it showed the cut section of dirofilarial worm with cuticle, muscular layer, intestine, and reproductive tube. We report this case entity due to diagnostic confusion with breast malignancy clinically and radiologically.

Encapsulated living worms due to periorbital dirofilariasis: detection with high-resolution sonography

Sonography (US) is commonly required when a superficial lump appears. We present the case of a patient for whom US was highly suggestive of living worms causing a recurrent periorbital mass. After surgery, the final diagnosis was a nodule composed of dirofilariasis larva.

Recent advances on Dirofilaria repens in dogs and humans in Europe

Dirofilaria repens is a nematode affecting domestic and wild canids, transmitted by several species of mosquitoes. It usually causes a non-pathogenic subcutaneous infection in dogs and is the principal agent of human dirofilariosis in the Old World. In the last decades, D. repens has increased in prevalence in areas where it has already been reported and its distribution range has expanded into new areas of Europe, representing a paradigmatic example of an emergent pathogen. Despite its emergence and zoonotic impact, D. repens has received less attention by scientists compared to Dirofilaria immitis. In this review we report the recent advances of D. repens infection in dogs and humans, and transmission by vectors, and discuss possible factors that influence the spread and increase of this zoonotic parasite in Europe. There is evidence that D. repens has spread faster than D. immitis from the endemic areas of southern Europe to northern Europe. Climate change affecting mosquito vectors and the facilitation of pet travel seem to have contributed to this expansion; however, in the authors' opinion, the major factor is likely the rate of undiagnosed dogs continuing to perpetuate the life-cycle of D. repens. Many infected dogs remain undetected due to the subclinical nature of the disease, the lack of rapid and reliable diagnostic tools and the poor knowledge and still low awareness of D. repens in non-endemic areas. Improved diagnostic tools are warranted to bring D. repens diagnosis to the state of D. immitis diagnosis, as well as improved screening of imported dogs and promotion of preventative measures among veterinarians and dog owners. For vector-borne diseases involving pets, veterinarians play a significant role in prevention and should be more aware of their responsibility in reducing the impact of the zoonotic agents. In addition, they should enhance multisectorial collaboration with medical entomologists and the public health experts, under the concept and the actions of One Health-One Medicine.

The Increase of Exotic Zoonotic Helminth Infections: The Impact of Urbanization, Climate Change and Globalization

Zoonotic parasitic diseases are increasingly impacting human populations due to the effects of globalization, urbanization and climate change. Here we review the recent literature on the most important helminth zoonoses, including reports of incidence and prevalence. We discuss those helminth diseases which are increasing in endemic areas and consider their geographical spread into new regions within the framework of globalization, urbanization and climate change to determine the effect these variables are having on disease incidence, transmission and the associated challenges presented for public health initiatives, including control and elimination.

Canine and human Dirofilaria infections in the Balkan Peninsula

Dirofilaria immitis and Dirofilaria repens infections are mosquito-borne diseases, mainly of dogs. Both parasites are zoonotic, and they sometimes cause serious infections in humans. The aim of this short review was to examine the situation in the Balkan Peninsula, from where it is not always easy to obtain suitable data, often reported in journals and other publications difficult to be retrieved and with poor or no visibility. The review included data from international and regional literature, doctoral theses, and conference proceedings.