A presente dissertação teve como principal intuito a caracterização parasitológica gastrointestinal numa amostra do efetivo de equinos do 3º e 4º Esquadrões a Cavalo da Guarda Nacional Republicana de Lisboa. Do 3º Esquadrão a Cavalo – Ajuda, foram colhidas amostras fecais de 38 …
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Insecticide application via indoor residual spraying (IRS) and long-lasting insecticide-treated bednets (LLIN) has been a key component in combating malaria in sub-Saharan Africa, with pyrethroids being the traditionally recommended insecticides. However, the resistance of Anoph…
The aim of this experiment was to determine what effect gill parasites have on reproduction in stripetail darters. Nearly 450 stripetail darters were collected from Estill Fork stream in Jackson County, Alabama. Their gonads were excised and the oocytes were photographed, counte…
Coccidiosis is an economically important enteric disease of poultry caused by protozoan parasites belonging to the genus Eimeria . Drugs are most commonly used to control coccidiosis. Widespread usage of anticoccidial drugs in the field has resulted in development of drug resist…
Malaria has plagued mankind for millennia. Antimalarial drug use over the last century has generated highly drug-resistant parasites, which amplify the burden of this disease and pose a serious obstacle to control efforts. This dissertation is motivated by the simple fact that m…
Infection with Giardia duodenalis (syn. Giardia lamblia, Giardia intestinalis) is one of the most common intestinal protozoan infections in humans all around the world. Symptoms associated with human giardiasis are diverse an iinfected patients may develop abdominal cramps, naus…
Lernaeocera branchialis (L., 1767) is a parasitic copepod that parasitises a range of gadoids by anchoring in the proximity of the branchial chamber of its host, deriving nutrition from the blood of its host and causing serious pathogenic effects. This study investigates the tax…
In contrast to most blood sucking flies, the structure of the spermathecae in phlebotomine sandflies exhibits extraordinary diversity. The objective of this study was to investigate the fine structure of the spermathecae in relation to mating of phlebotomine sandflies. Light mic…
Certain aspects of the relationship between small mammals and their epifaunistic communities were investigated in a habitat supporting three rodent species. Preliminary studies indicated that, in an area of rough grass and bramble shrub, a community of rodents existed harbouring…
Visceral leishmaniasis (VL) is a potentially fatal infectious disease caused by the protozoan parasites Leishmania chagasi , L. infantum or L. donovani . Infection leads to a variety of outcomes ranging from asymptomatic infection to active disease, which is characterized by fev…
Introduction: Where access to sanitation is incomplete and environmental water contact high, water-borne diseases such as schistosomiasis can be common in children and occur alongside other parasitic diseases. Parasitological diagnosis based upon microscopy of parasite ova or la…
Tetratrichomonas gallinarum and Cochlosoma anatis are flagellated parasites whose host range include commercial turkeys. Found in the intestinal tract of infected birds, these protozoa have been suggested to be enteric pathogens. However, the pathogenicity of T. gallinarum and C…
Over the past few decades, global changes have resulted in the re-emergence of vector-borne diseases (VBDs), including but not limited to, malaria, dengue fever, and Zika in many parts of the world, inflicting high morbidity and mortality at a disproportionate level, especially …
Molecular genetic data from parasites can reveal information about parasite dispersal abilities as well as movement patterns of their hosts. In this study, mitochondrial cytochrome oxidase I DNA sequences of the large turkey louse (Chelopistes meleagridis) are investigated to de…
Leishmania are protozoan parasites that are transmitted by a sand fly vector. These parasites affect not only humans but also wild animals including domestic dogs and rodents, which form an additional challenge and public health problem to control the disease. Leishmaniasis is a…
Co-infection with malaria and hookworm is a common problem among the rural poor in developing nations. Clinical data characterizing the interaction between these two pathogens is limited and highly conflicting, and currently available animal model systems are not compatible with…