The genus Strongyloides (Nematoda; Strongyloididae) comprises over 50 species of nematodes parasitic in terrestrial vertebrates, including humans (Homo sapiens), dogs (Canis lupus familiaris) and cats (Felis catus). Taxonomy of the genus has been shaped by over a century of morphological research, with the most widely adopted framework established in the late 1980s. Advances in molecular genetics have increasingly revealed cryptic diversity and yielded new insights into interspecific and intraspecific relationships within the genus. Despite the rapid expansion of molecular genetic data over the past decade, particularly for Strongyloides spp. infecting humans and companion animals, a synthesis of these findings remains lacking. Here, we review historical and contemporary literature on the taxonomy of Strongyloides spp. infecting humans (Strongyloides stercoralis, Strongyloides fuelleborni), dogs (S. stercoralis, including host-specific lineages and cryptic taxa) and cats (Strongyloides felis, Strongyloides planiceps, Strongyloides tumefaciens and S. stercoralis). We provide an updated overview of taxonomic histories, host ranges and key morphological features for genus identification and species differentiation, along with a synthesis of available molecular taxonomic data informed by phylogenetic and population genetic studies. This work is intended to serve as a renewed reference for researchers, diagnosticians and clinicians working with Strongyloides spp. in medical and veterinary contexts, supporting accurate diagnosis and guiding future taxonomic research on these nematodes.

Strongyloides stercoralis has historically dominated research and control efforts for strongyloidiasis in both medical and veterinary fields. This has obscured the significance of other Strongyloides species infecting humans and their closest companions, dogs (Canis lupus familiaris) and cats (Felis catus). This review synthesized clinical and epidemiologic evidence on these neglected agents of human and companion animal strongyloidiasis and outlined priorities for future research. Our aim is to raise awareness of these understudied species and promote research to clarify their medical and veterinary public health significance. Targeted species-specific surveillance using molecular-genomic and advanced morphological tools is essential to uncover the true burden of these infections and inform strategies for their control and eventual elimination.

Companion animals, or ‘pets’, are integral to many people's lives and to their sense of home. However, older people living with companion animals are vulnerable to separation from their animals when moving to a care home. Such separation is often a highly significant loss which, combined with other losses, may reinforce experiences of dislocation. Existing research draws attention to the importance of developing a sense of ‘home’ in a care home through reinforcing and preserving personal connections. However, there is a paucity of research examining the preservation of connections between older people resident in care homes and their animal/s. This study draws on thematic analysis of 29 qualitative interviews with older people living in care homes, relatives, care home staff and other relevant stakeholders. It highlights that retaining existing, often long-term, bonds with companion animals represent important continuities and connections which may contribute to positive adjustment to life in a care home and creating a sense of home. However, participants highlighted that supporting an older person to move into a care home with their companion animal may be challenged by real or perceived constraints such as use of shared space, concerns about the risks posed by animals and staff implications. While our study found examples of good practice of how shared residence between an older person and companion animal can be achieved in a care home, other examples highlighted that the time, complexity of planning and structures required to accommodate animals were prohibitive to merit a change of policy and practice. Our research concludes that more attention should be given to the older person–animal bond as an important source of continuity and connection.

Consumer concern about farmed animal welfare is growing but does not always translate into real-world purchasing behaviour of welfare-friendly animal products for human consumption. Possible reasons for this include unfamiliarity with farming practices and economic sensitivity. In contrast, the number and role of pets in the United States have grown measurably, and spending on pets is strong. The pet food market has many opportunity niches as pet owners navigate strong marketing trends and nutrition philosophies. We hypothesised that pet owners in the US would be willing to pay a premium for pet food containing welfare-friendly animal ingredients. Eight hundred and thirty-eight pet owners completed an online survey asking questions that measured their knowledge of and interest in farm animal welfare, and their willingness-to-pay for pet food labelled as farm animal welfare-friendly. Respondents overall displayed relatively low knowledge about farm animal welfare, but poor self-assessment of their own knowledge. They displayed interest in farm animal welfare and an overall positive mean willingness-to-pay (WTP) for welfare-friendly pet food. Younger respondents, women and cat owners displayed a higher WTP than older respondents, men and dog owners. Income level was not correlated to WTP. Creating pet food products that contain animal ingredients produced using welfare-friendly practices may enhance farm animal welfare via two primary avenues: by providing a sustainable and value-added outlet for the by-products of welfare-friendly human food products, and by providing an educational opportunity about farm animal production via pet food packaging and other advertising.

Although cats are extremely common, pet owners seem to have a poor understanding of their natural behaviour and needs and a large number end up in cat shelters. In Sweden, no records exist of the number of cat shelters or their activities. The aim of this study was to investigate the occurrence of cat shelters in Sweden. We found 62 cat shelters during 2006; the year in which this study was conducted. Questionnaires were sent to these shelters with questions concerning: received animals, reasons for relinquishing cats, cat husbandry and how the shelter was run. The most common reason for relinquishing a cat was that the cat was homeless; another common reason was that the owner had an allergy to cats. The shelters had, on average, space for 29 cats, but this varied from six-to-100, and they received on average ten cats per month. This means that a total of around 7,400 cats enter the 62 shelters in Sweden each year. On average, the cats stayed more than three months in the shelter. Less than 10% of the relinquished cats were euthanised. Our study reveals that there are shelters that continuously receive unwanted cats. The majority of these cats are said to be homeless, therefore in order to minimise the number of cats in shelters in Sweden, the focus should be on reducing the number of homeless cats.

The ability to evaluate the welfare of non-human animals accurately and objectively is influenced by a variety of factors including the nature of our relationships with them. Subjective biases in the perception of an animal's quality of life can have either positive or negative consequences for its welfare and are likely to be particularly exaggerated in the case of companion animals, such as dogs, cats and other pet species, with which people tend to form strong anthropomorphic, attachment-based relationships. The consequences of these subjective biases are likely to be further exacerbated by the fact that many of the physical and behavioural attributes that humans find appealing, and have selected for, in companion animals, are inherently detrimental to their welfare. Using a range of examples, this paper explores some of the complex ways in which anthropomorphism and subjectivity can cloud our ability to make reliable judgements concerning the welfare of companion animals, even in the face of seemingly obvious and overt indicators of pain and suffering.

The identity of the passer in Catullus 2 and 3 has been a subject of controversy for hundreds of years.1 Sir D'Arcy Wentworth Thompson, the great authority on birds in the ancient world, sums it up best with his own musings: ‘Whatever Lesbia's “sparrow” may have been, I am pretty sure in my own mind […] that it was not Passer domesticus, the most intractable and least amiable of cage-birds.’2 Some scholars opt for an obscene interpretation of passer, while others argue that passer must refer to a bird like a bullfinch (Pyrrhula pyrrhula). To test the validity of these arguments, this paper examines four key components of the passer poems, and the passer debates. Firstly, it determines the Roman cultural view of sparrows and whether they regarded the birds as pets, pests, or something else entirely. Secondly, it analyses Roman trends in bird-keeping and looks for other examples of pet passeres in art and literature. Thirdly, it considers actual bird behaviour to reveal whether a sparrow could act the way Catullus describes. Finally, it analyses the different potential meanings of the word passer to determine which birds fell under its descriptive umbrella. In this way we can judge whether the passer was indeed a sparrow while also determining the place of sparrows in Roman thought and pet-keeping culture.

There is a substantial amount of literature that suggests that animals, and specifically animals kept as pets, can have a positive effect on wellbeing. Research exploring the impact of animals on wellbeing in care homes mainly concerns visiting animals as well as shared communal pets. In light of the lack of research regarding personal pets in care homes, the aim of this study was to explore what the experience of keeping a personal pet in a care home means for residents’ sense of wellbeing. Semi-structured interviews were conducted with seven care home residents who were currently living with their pet in a care home. Interviews were analysed using Interpretative Phenomenological Analysis (IPA). Analysis revealed four master themes deemed to be relevant to participants’ wellbeing. these were: ‘sense of self and identity’, ‘responsibility and ownership’, ‘motivation and desire to live’ and ‘feeling content in the care home’. The analysis indicated that living with a personal pet in a care home has the potential to enhance residents’ wellbeing. At the same time, it also found that the benefits of keeping a personal pet may be dependent on specific circumstances, such as the attitudes of staff and fellow residents at the care home. This study indicates that it may be advisable for more care homes to accept personal pets.

Essential oils (EOs) are considered a new class of ecological products aimed at the control of insects for industrial and domestic use; however, there still is a lack of studies involving the control of fleas. Ctenocephalides felis felis, the most observed parasite in dogs and cats, is associated with several diseases. The aim of this study was to evaluate the in vitro activity, the establishment of LC50 and toxicity of EOs from Alpinia zerumbet (Pers.) B. L. Burtt & R. M. Sm, Cinnamomum spp., Laurus nobilis L., Mentha spicata L., Ocimum gratissimum L. and Cymbopogon nardus (L.) Rendle against immature stages and adults of C. felis felis. Bioassay results suggest that the method of evaluation was able to perform a pre-screening of the activity of several EOs, including the discriminatory evaluation of flea stages by their LC50. Ocimum gratissimum EO was the most effective in the in vitro assays against all flea stages, presenting adulticide (LC50 = 5.85 μg cm−2), ovicidal (LC50 = 1.79 μg cm−2) and larvicidal (LC50 = 1.21 μg cm−2) mortality at low doses. It also presented an excellent profile in a toxicological eukaryotic model. These findings may support studies involving the development of non-toxic products for the control of fleas in dogs and cats.

The protozoan Toxoplasma gondii infects about one-third of the world's population. The consumption of raw meat, contact with cats, contact with soil, and ingestion of food or water contaminated with soil are considered to be the most important sources of infection. Still in most women who were infected during pregnancy, no definitive source of infection is found. In 2014–2016, independent sources of T. gondii infection were searched for by gathering epidemiological data from 1865 (519 infected) responders. Touching garden soil (odds ratio (OR) 3·14, 95% confidence interval (CI) 1·3–6·35), sustaining cat-related injuries (OR 2·16, 95% CI 1·25–3·74), and eating improperly washed root vegetables (OR 1·71, 95% CI 1·02–2·87), but not risky sexual behavior (OR 1·22, 95% CI 0·79–1·90), were the predictors of infection. The seroprevalence of T. gondii infection had been increasing up to ages 35–50 in men and ages 50–54 in women. Past those ages, seroprevalence of toxoplasmosis has been decreasing. This suggests that the natural decrease of anamnestic antibodies concentrations over time leads to positivity-to-negativity seroconversion in many subjects. If this is true, then the prevalence of T. gondii infection in a general population and its potential impacts on public health could be much larger than generally believed.