High seroprevalence of SARS-CoV-2 in white-tailed deer (Odocoileus virginianus) at one of three captive cervid facilities in Texas

Free-ranging white-tailed deer (Odocoileus virginanus) across the United States are increasingly recognized as involved in SARS-CoV-2 transmission cycles. Through a cross-sectional study of 80 deer at three captive cervid facilities in central and southern Texas, we provide evidence of 34 of 36 (94.4%) white-tailed deer at a single captive cervid facility seropositive for SARS-CoV-2 by neutralization assay (PRNT90), with endpoint titers as high as 1280. In contrast, all tested white-tailed deer and axis deer (Axis axis) at two other captive cervid facilities were seronegative, and SARS-CoV-2 RNA was not detected in respiratory swabs from deer at any of the three facilities. These data support transmission among captive deer that cannot be explained by human contact for each infected animal, as only a subset of the seropositive does had direct human contact. The facility seroprevalence was more than double of that reported from wild deer, suggesting that the confined environment may facilitate transmission. Further exploration of captive cervids and other managed animals for their role in the epizootiology of SARS-CoV-2 is critical for understanding impacts on animal health and the potential for spillback transmission to humans or other animal taxa.

A Behavioural Study of Free Ranging Ceylon Spotted Deer (Axis axis ceylonensis) in Trincomalee, Sri Lanka

Axis axis ceylonensis (Ceylon spotted deer) is a sub species endemic to Sri Lanka. Ecological observations in wild populations of this subspecies have been reported but there is no published research on its behaviour. We report here a behavioural study on a free ranging population of A. a. ceylonensis inhabiting a temple surroundings in Trincomalee, Sri Lanka. Behaviour was quantified by focal sampling on sex age groups in three time zones: 6:30 to 7:30, 12:30-13:30, and 17:00 to 18:00 hours. The deer were more active in the hour after dawn and an hour before dusk. The main activities were feeding and play, the latter common in juveniles. There was a preference to graze on grasses and browse on Ficus sp. leaves. Resting was highest in the afternoon across all groups. This bimodal activity pattern is similar to that of both wild Ceylon and Indian A. axis subspecies despite the absence of predators in the study area. The bimodal activity may be related to thermoregulatory functions while grazing in open grass areas.

Zoonotic diseases appeared to be a major hurdle to successful deer farming in Bangladesh

Background and Aim: Due to the diversified lifestyle and fancy ecology associated with Chitra deer (Axis axis), deer farming has become popular in Bangladesh. Diseases may be the common constrain of successful deer farming. This study aims to investigate the pathological, bacteriological, and nucleic acid based technologies to identify specific causes of morbidity and mortality of captive deer. Materials and Methods: Two deer farms and a park deer (designated as farm A, B, and C) entailing 87, 54, and 20 deer, respectively, showed illness and death constitute the study materials. A total of 42 deer died during this investigation. Following death, routine post-mortem examination, histopathology, impression smear staining, isolation, and identification of bacteria were carried out. Polymerase chain reaction (PCR) and reverse transcription PCR were carried out to safeguard the etiology. Results: Clinically, farm A and B showed the acute phase of illness and park deer showed chronic illness. Case fatality rates were 90%, 92%, and 100% in farms A, B, and C deer, respectively. Pasteurella multocida and Streptococcus pneumoniae were identified from the visceral organs of farm A deer. Farm B deer was infected with Clostridium perfringens type A. Park deer was infected with Mycobacterium tuberculosis and hydatid cyst. Conclusion: The infectivity in farm A deer was due to stress as induced by punishing weather. The infectivity in farm B deer was due to feeding a higher volume of protein in the diet. The park C deer may optate infection from companion man and animals living around. The diseases of captive deer identified mainly were zoonotic. It needs extensive veterinary services and specialized technologies to identify these diseases, monitor the infectivity and eliminate the public health important diseases at early onset.

Spread Risk Assessment of Invasive Axis Deer using Bioclimatic Niche Models

Ecological niche models (ENM) calibrated with data from native and invaded ranges are useful tools to manage biological invasions and can be challenged by niche shifts and non-equilibrium processes. We modeled the extent of the potential invasion by the axis deer (Axis axis) worldwide, testing the reciprocal hypotheses of niche conservatism and shift. We quantified niche overlap on the multivariate climatic space and modeled climatic realized niche based on detailed field information. We showed that the axis deer shifted its realized niche after the invasion. We rejected the niche equivalency hypothesis. Most of the climatic niche available in invaded areas is contained in the native climatic niche. Non-equilibrium between native and invasive niches of the axis deer was confirmed due to a large number of unfilled areas in invaded regions. Our projections predict that the most significant regions suitable for the axis deer are located in tropical and subtropical climates around the equator and the southern hemisphere, mostly in the Neotropics.

To the Issue of Editing the New Technical Terminology

Georgian technical terminology (Georgian-Russian and Russian-Georgian parts of it) became obsolete long ago and cannot correspond to the modern demands. This terminology needs not only to renew but change structurally. The growing progress of modern communication and information technologies demands updating of the scientific terminology in general and of the technical terminology particularly. It is obvious that foreign terms took their place not only in speech but in the scientific literature as well. The examples of terminology using which we meet in our everyday life, especially when reading or listening to the ads,are absolutely unacceptable. For example, the ads propose us to restore so called rulevoi – from the Russian руль (steering wheel); they also suggest the grids against grokhot – that is грохот in Russian (clatter) and so on; as usual, technical terms in ads are always given in Russian, sometimes in some other languages, but almost nobody uses Georgian technical terms. Unfortunately, sometimes already existed terminology also favors using untranslated terms such as: bremsbergi (bremsberg – cross entry); versori (versor- a unit length), lafeti (lafet – gun carriage) and many others. True, it is impossible to translate all of the foreign terms always and only in Georgian. Some of such terms may be included in the new technical terminology unchanged, without translation. It is especially conditioned by the fact that nowadays a huge stream of the foreign terms floods the Georgian language. If we want the term and its function be easy to understand and use, then the new technical terminology should be arranged in the form of the explanatory dictionary without so called headwords; this will enable us to avoid diverse interpretations of the terms in the technical literature and manuals. We suggest here some faults found in the existed terminology which are absolutely necessary to improve during editorial work. Many terms need to refine: not იგრიხებადი (crooking) but გრეხადი (crookable); იწვებადი – წვადი (burning – burnable) and some others. Synonymic terms should be used without non-Georgian corresponding words: for example, we meet in the technical terminological dictionaries such pairs as: შკაფი — კარადა (a wardrobe – in Russian and in Georgian); შოფერი — მძღოლი (a driver); შოფერი — მექანიკოსი (driver-mechanic); სკრაიბერი — საკაწრელი (scriber). Besides that, some terms which denote the notions which we classify as visible and invisible should merge, e.g. ღერძი (axis) - Axis can be a part of a car, an eye, also axis of symmetry, of coordinates and so on; also არხი (channel) – it can be in melioration, in television and so on. Some obsolete terms should be extracted from terminological dictionaries, such as: бензозаправочная колонка (Rus.) - ბენზინის ჩასასხმელი სვეტი // ბენზინის ჩასასხმელი; there must be ბენზინგასამართი (Petrol station).

Parasitic infection in captive wild mammals and birds in Bangabandhu Sheikh Mujib Safari Park, Cox’s Bazar, Bangladesh

We investigated the infection rate of gastrointestinal (GI) parasite eggs and premature stages from different wild animals and birds in Bangabandhu Sheikh Mujib Safari Park, Dulahazra, Cox’s Bazar. A total of 56 fecal samples were collected from 24 species during July to November 2012 using modified Stoll’s ova dilution technique. Coprology analysis revealed that the overall rate of parasitic infection was 78.6%, of which 51.8% were helminths and 35.7% protozoa. The identified parasites were Paramphistomum spp. (7.1%), Fasciola spp. (5.4%), strongyles (26.8%), Ascaris spp. (3.6%), Strongyloides spp. (7.1%), Dictyocaulus spp. (5.4%), Trichuris spp. (3.6%), Capillaria spp. (5.4%), Heterakis spp. (3.6%), and Balantidium coli (35.7%). Mixed infection (21.4%) was observed in nine animals, including co-infection with Balantidium coli and strongyles in Tiger Panthera tigris, Sambar Deer Rusa unicolor and Pig-tailed Macaque Macaca nemestrina, Strongyloides spp., Trichuris spp. and larvae of Dictyocaulus spp. in Capped Langur Trachypithecus pileatus, Balantidium coli and Capillaria spp. in Clouded Leopard Neofelis nebulosa, Fasciola spp. and Balantidium coli in Spotted Deer Axis axis, Ascaris spp. and strongyles in African Elephant Loxodonta africana, Strongyloides spp. and Heterakis spp. in Peafowl Pavo cristatus and Heterakis spp. and strongyles co-infection in Great Pied Hornbill Buceros bicornis. It is concluded that GI parasites were prevalent in this safari park. Further epidemiological investigation is necessary for controlling parasitic infection.