No abstract

Species of fish of Marajó Island, State of Pará, Brazil, were examined to identify the trematodes parasitizing 102 Hoplerytrinus unitaeniatus (gold wolf fish) and 104 Hoplias malabaricus (thraira). Metacercariae of two species of trematodes, 170 specimens of Clinostomatopsis sorbens and 10 Ithyoclinostomum dimorphum were found and identified. The parasitary indices of C. sorbens from H. unitaeniatus and H. malabaricus, were 43.14% and 30.77% for prevalence, 2.52 and 1.84 for mean intensity, 1.09 and 0.57 for mean abundance and 1 to 9 and 1 to 7 for range of infection, respectively, on both fish the site of infection was the mesentery. The parasitary indices of I. dimorphum from H. unitaeniatus were 2.94% for prevalence, 2.66 for mean intensity, 0.08 for mean abundance, 1 to 4 for range of infection, and the sites of infection were the mesentery and the muscle. Metacercariae of I. dimorphum were collected in muscles of a specimen of H. malabaricus, with 0.96% of prevalence, intensity of infection of 2 parasites and 0.02 of abundance. New morphological data of external and internal structures are presented. This is the first record of metacercariae of C. sorbens and I. dimorphum in Amazonian fish.

The aim of this study was to evaluate the tegument, musculature and mesentery of 102 specimens of

Zoonotic parasites can infect fish and be a serious threat to human health. The objective of this research was to estimate the prevalence for the main fish-borne zoonotic parasitic diseases of freshwater fish marketed in Colares Island and Vigia, Pará, Brazil. In February, 2012, 85 (40 of Colares and 45 of Vigia) fish were randomly sampled by means of net fishing. Eighty and 76% of fish sampled were parasitized, being silver croacker (Plagioscion squamosissimus), kumakuma (Brachyplatystoma filamentosum), and gilded catfish (Brachyplatystoma rousseauxii) the species most parasitized. The most prevalent parasites were Anisakis (50% in Colares and 49% in Vigia) and Contracaecum (60% in Colares and 40% in Vigia), followed by Pseudoterranova (2% in Colares and 11% in Vigia), Eustrongylides (10% in Colares and 0% in Vigia) and Hysterothylacium (2% in Colares and 7% in Vigia) in the species: silver croacker, kumakuma and gilded catfish, in both cities. Mesentery (55%) was the organ with highest level of intense infestation. A greater proportion of massive infestation was observed in females (57%) than in males (12%). Results of this study indicate that fish caught in Colares and Vigia could be of high risk for consumer.Keywords: Anisakidae, Eustrongylides, zoonosis, Public Health, Amazonia. ResumoParasitos zoonóticos podem infectar peixes e causar sérios agravos à saúde humana. O objetivo do presente estudo foi estimar a prevalência e identificar os fatores de risco para doenças parasitárias veiculadas por peixes de água doce comercializados na ilha de Colares e Vigia, Pará, Brazil. Em fevereiro de 2012, 85 peixes (40 de Colares e 45 de Vigia) foram coletados de forma aleatória com redes de pesca. Oitenta por cento e 76% dos peixes amostrados estavam parasitados, sendo a corvina (Plagioscion squamosissimus), piramutaba (Brachyplatystoma filamentosum) e dourada (Brachyplatystoma rousseauxii), as espécies mais parasitadas. Os parasitos mais prevalentes foram: Anisakis (50% em Colares e 49% em Vigia) e Contracaecum (60% em Colares e 40% em Vigia), seguido pelo Pseudoterranova (2% em Colares e 11% em Vigia), Eustrongylides (10% em Colares e 0% em Vigia) e Hysterothylacium (2% em Colares e 7% em Vigia) nas espécies: corvina, piramutaba e dourada, em ambos os municípios. O mesentério (55%) foi o órgão que apresentou infestação maciça em maior quantidade. A infestação maciça também foi observada com maior proporção em fêmeas (57%) do que em machos (12%). Os resultados deste estudo indicam que o peixe capturado em Colares e Vigia pode ser de alto risco para a o consumidor.

ResumoO experimento foi realizado com o objetivo de investigar a dinâmica da infecção por nematódeos gastrintestinais em vacas no periparto. Utilizaram-se 106 vacas de corte, divididas em dois grupos: o grupo 1 (G1), constituído por 42 vacas de primeira e segunda cria; e o grupo 2, (G2) por 76 vacas de terceira cria ou mais. A partir dos 120 dias do pré-parto até os 90 dias pós-parto, coletaram-se fezes para contagens de ovos por grama de fezes (OPG) e sangue para determinação do volume globular e hemoglobina de cada um dos animais a intervalos mensais. Nos mesmos intervalos, avaliaram-se os escores de condição corporal (ECC). Os valores médios ± desvios-padrão de OPG para os animais do grupo 1 foram iguais a 19,4 ± 42,9, enquanto para os do grupo 2 foram de 31,1 ± 68,0 não havendo diferenças significativas entre eles, tampouco entre os valores hematológicos que permaneceram nos padrões normais para ambos os grupos. Maiores contagens de OPG foram observadas no período pós-parto, com médias de 32,5 ± 55,5 e 51,5 ± 84,8 para os grupos G1 e G2, respectivamente. Observou-se diferença significativa (p < 0,05) nos parâmetros estudados, quando foram comparados os períodos pré e pós-parto dentro de cada um dos grupos, com diminuição dos valores hemáticos e escore corporal e aumento dos valores de OPG no pós-parto. Os resultados sugerem que as vacas podem estar mais susceptíveis à infecção por nematoides desde o parto até os 90 dias pós-parto; todavia, vacas adultas, quando bem manejadas, não constituem fator importante na epidemiologia das verminoses gastrintestinais, mesmo no período pós-parto.Palavras-chave: Bovinos, helmintos, periparto, dinâmica parasitária. AbstractThe experiment was conducted to investigate the dynamics of infection by gastrointestinal nematodes during the periparturition period in cows. One hundred and six beef cows were divided into two groups: G1 was formed by 42 cows of one and two parturitions, and G2 by 76 cows of three or more parturitions. From the 120 days pre partum until the 90 days post partum, feces were collected for faecal egg counts (EPG) while blood was collected to determine the packed cell volume and hemoglobin levels of each animal, with monthly intervals. In the same intervals the body condition scores (BCS) were evaluated. The mean values ± standard deviation of the EPG for G1 were equal to 19.4 ± 42.9, and for G2 31.1 ± 68.0. No significant differences were observed between G1 and G2 in relation to EPG and hematological parameters, which remained within normal patterns for both groups. The two groups had higher counts of EPG in the post partum period than in the pre partum period, with averages of 32.5 ± 55.5 and 51.5 ± 84.8 for groups G1 and G2, respectively. A significant difference (p < 0.05) in the parameters was observed when comparing the pre and post partum within each group studied resulting in declining values of blood and body score and an increase in EPG in the post partum. The results suggest that the cows may be more susceptible to infection by nematodes from gi...

The objective of the present study was to report the occurrence of Trypanoxyuris in owl monkeys, using data from clinical and haematological examinations, as well as clinical chemistry (blood urea nitrogen (BUN), creatinine, alanine aminotransferase (ALT) and aspartate aminotransferase (AST)) of infected and uninfected animals. Twenty animals in apparently good clinical health were studied. The coproparasitological examinations showed eggs compatible with Trypanoxyuris sp. in 50% of animals. The number of red blood cells, haematocrit and haemoglobin levels were significantly higher in the males, compared to the females, irrespective of parasitism. However, comparing segmented neutrophils in infected males and females, a significant difference (P < 0.05) was observed. All blood chemistry values were considered normal for the species pattern, even though significant differences were observed for BUN and ALT in infected males. The infection by Trypanoxyuris sp. did not appear to interfere with the clinical condition of animals.

This work presents a case of sudden death of a non-human adult male primate, which belongs to the National Primate Center (CENP - Ananindeua - Pará - Brazil). The specimen was necropsied, and the anatomicopathologic exam showed a great collection of clotted blood in the right thoracic cavity, forming a mold. The aorta revealed an extensive lesion in its intima with a disruption area in its tissue. In the lungs, three encapsulated parasites were observed in subpleural location, specifically in the diaphragmatic, right apical and accessory lobes, measuring 05 mm diameter, which revealed a C-form by transparency analysis, characteristic of the nymphal stage of Pentastomida. Two cysts were dissected and the parasites demonstrated structural and morphometric patterns compatible with the nymph of Porocephalus. Histologically, encapsulated parasites were observed in the lungs, with inflammatory reaction in the underlying parenchyma, presence of exudate composed of fibrin, macrophages, detaching the eosinophils and presenting no granulomatous reaction. The aortic adventitial tissue presented development of granulation tissue, deposit of fibroid material in its margins, prevalence of eosinophils and free blood. The macroscopic and microscopic alterations in the aorta, as well as the presence of nymphs of Pentastomida in the lungs are data that base the hypothesis that the aortic lesion was responsible for the fatal picture of internal hemorrhage, and this picture was due to the migratory process of Pentastomida.

ResumoO objetivo desta pesquisa foi registrar a presença de cestoides Trypanorhyncha, suas prevalências e intensidades de infecção, na musculatura e serosa abdominal parietal de 50 AbstractThe aim of this research was to report the presence of Trypanorhyncha cestodes, their prevalence and mean intensity in the muscles musculature and abdominal serose in commercial fish processed in Belém, Pará State. Fifty specimens of M. ancylodon were captured in the North Coast of Brazil. The musculature and adjacent abdominal serose of fish were analized in a "candling table" after filleted. Eight specimens were parasitized by plerocercoids of Poecilancistrium caryophyllum, with a prevalence of 16% and mean intensity of infection of one plerocercus per fish, varying from the unique site of infection was the musculature. The species P. caryophyllum is reported by the first time on M. ancylodon.Keywords: Trypanorhyncha, Poecilancistrium caryophyllum, Macrodon ancylodon, Brazil.O pescado destinado ao consumo humano deve ser alvo de maior preocupação por parte dos serviços de fiscalização sanitária, pois algumas enfermidades de peixes têm caráter zoonótico, como é o caso do parasitismo por nematoides anisaquídeos, por trematódeos digenéticos e por cestoides difilobotrídeos (THATCHER; BRITES NETO, 1994). Alguns parasitos, entretanto, mesmo não sendo transmissíveis ao homem, adquirem importância quando causam repugnância em relação à aparência da carne parasitada pelos helmintos. Nesse contexto, situam-se os cestoides da ordem Trypanorhyncha, objetivo de diversos estudos em peixes do litoral