By Q. Marik. Viterbo College.
Minimal deflections of the B/F ratio can frequently be attributable to random binding of labeled antigen or to other non-specific effects purchase ranitidine 150 mg otc. While the re markable therapeutic advances of the past two decades have allowed physicians to treat tuberculosis in a fashion similar to other bacterial infections generic ranitidine 300 mg with visa, the requirement for isolation and culture of mycobacteria from relatively inaccessible organs order ranitidine 150 mg overnight delivery, coupled with the slow multiplication rate of the tubercle bacillus, present major problems for diagnosis. According to the World Health Organization  there are approximately 20 million people with active tuberculosis who annually infect from 50 to 100 million people. The death rate attributable to this disease remains high — about 3 million people per year. Ready detection and earlier treatment are required to reduce the death rate from this disease in the developing nations with the highest infection rates. This process renders samples safe, dis sociates antigen-antibody complexes and denatures endogenous anti body. That the final product is not homogeneous is evidenced by our observation that doubling the antibody concentration did not result in doubling the bound/free ratio. The concentration of immunoreactive material detected in culture media is expressed in terms of the protein concentration of a stan dard that is known to be impure; therefore, the true concentrations are lower than those shown. Nonetheless, it did seem reasonable to expect that measurement of a secretory protein which accumulates in a culture medium might be satisfactory. Also shown are the cross-reactivities of similar preparations derived from other mycobacterial species. Concentrations of secretory tuberculoprotein in aliquots o f Middlebrook 7H9 culture of Sutum Specimen No. These data are consistent with our finding that dilutions of immunoreactive material in culture filtrates of M. The serial production of immunoreactivity by positive sputum samples incubated in Middlebrook 7H9 medium is shown in Figs. The liquid culture medium contained 100 ng of tuberculoprotein per m L as early as day 4 (Fig. However it was not until a week later that a rapid increase in the production of immunoreactive tuberculoprotein was initiated. After 48 hours the tuberculoprotein concentration in the constantly agitated culture was 840 ng per m L while that in the more stationary cul ture medium was only 135 ng per mL. By day 7 the concentration in the agitated culture had peaked at 1500 ng per m L while more stationary cultures contained 240 ng per mL. In a similar experiment initial cultures were more concen trated, allowing the determination of the number of organisms and the level of immunoreactivity in the initial cultures (Fig. Concentration of secretory tuberculoprotein in aliquots o f Middlebrook 7H9 culture o f Sputum Specimen No. T h e p a r t i a l c r o s s - r e a c t iv i t y o f s e c r e to r y tu b e r c u lo p r o te in d e r iv e d fro m M. In a s e r ie s o f r e c e n t s tu d ie s im m u n o re a c tiv e t u b e r c u lo p r o te in h a s b e e n d e te c te d in sp u tu m and p la s m a o f p a t ie n t s w it h p u lm o n a ry tu b e r c u lo s is an d in c e r e b r o s p in a l an d a c e t ic f l u i d s fro m p a t ie n t s w it h tu b e r c u lo u s m e n in g it is and p e r i t o n i t i s. T h e im m u n o r e a c tiv ity i n sp utu m and c e r e b r o s p in a l h a s b e e n shown to b e s u p e rp o s a b le on P P D -C T -6 8 s ta n d a rd c u rv e s , an d to h a v e p h y s ic o c h e m ic a l p r o p e r t ie s s im ila r to th e im m u n o re a c tiv e m a t e r ia l in s ta n d a rd s an d c u lt u r e m e d ia . I t is a n t i c ip a te d t h a t th e s e m eth o d s w i l l b e m ade a p p lic a b le to th e d ia g n o s is an d m anagem ent o f h ig h ly p r e v a le n t co m m u n ic a b le d is e a s e s , su ch as t u b e r c u lo s is , f o r w h ic h c u r r e n t m eth o d s a r e tim e -c o n s u m in g and c o s t ly. In particular, while he and his colleagues had used *Ag in their studies on tuberculosis, he could not say whether *Ag or *Ab methods would prove superior. In response to questions, he indicated that he had not presented data on the direct measurement of the organism in sputum; these were in course of publication. Such measurements were performed on autoclaved samples which were perfectly safe to handle. He and his colleagues had performed measurements on plasma as well as on sputum, but Ag concentrations in plasma were lower and non-specific effects more pronounced, necessitating the use of a more sensitive assay. He was uncertain whether the tuberculoprotein involved was actively secreted or shed by the organism. The material was not highly antigenic; this minimized problems with endogenous Ab, but made the generation of high-titre antisera difficult. Studies to compare the diagnostic efficiency of the assay with those of conventional diagnostic techniques were under way. Ab levels in plasma had been high, however, even in control subjects, making Ag measurements difficult. Immunoassays for parasitic diseases are usually used in three situations, (a) for diagnosis, (b) for epidemiology, and (c) in the research laboratory. Radioimmunoassay, especially using 125I as a label has been more or less exclusively confined to the research laboratory. It has proved to be extremely valuable in the detection of low levels of particular antigens or antibodies in complex mixtures but it is not convenient for most field uses. These assays, especially the indirect method using enzyme-labelled anti-species globulin, have been employed to detect antibodies in virtually all parasitic diseases. The only requirement is that a suitable soluble antigen be available for attachment to the solid-phase surface. The merits of simplicity and sensitivity and ease of mass processing of samples is the reason for this. These tests have also been shown to be useful immunodiagnostic methods for toxocariasis, echinococcus, leishmaniasis, trypanosomiasis, toxoplasmosis and amoebiasis. It is especially suitable for rapid diagnosis where only a few samples are to be tested. This brief review indicates the wide potential of labelled reagent immunoassays which currently dominate the immunodiagnosis and sero-epidemiology of parasitic diseases.
Hobbyists typically sell offspring to recover the costs of maintaining their collection or to allow The Veterinarian / Aviculturist Relationship them the freedom of devoting more time to avicul- ture purchase 150mg ranitidine mastercard. Profit is not typically the primary motive of a To be of service to the aviculturist generic ranitidine 300 mg overnight delivery, a veterinarian hobbyist breeder buy ranitidine 300 mg without prescription. Many aviculturists may start as must understand some of the principles of aviculture hobbyists and turn that hobby into a profitable busi- as well as the principles of medicine and disease. A ness as they gain expertise and appropriate species knowledgeable avian veterinarian will serve as part of birds. The veterinarian should work closely with the avicul- turist to establish an effective preventive medicine Veterinary/client confidentiality is of utmost impor- program. A healthy, pre-existing aviculturist/veteri- seled in strict professional behavior to ensure that narian relationship ensures fast action if a disease they also maintain client/doctor confidentiality. They see and evaluate their birds Perform new bird examinations daily and must be willing to discuss even the slight- Perform resident bird examinations est changes in behavior, appetite, stance or excre- Assist in establishing and maintaining records ment output with the attending veterinarian. The Establish a preventive medicine program aviculturist must respect the veterinarian’s medical Offer husbandry advice judgement and strictly implement any and all sug- Provide emergency care for aviary birds gestions. If the advice of the veterinarian is not Take appropriate action in the face of disease outbreaks sought after and respected, a new veterinarian Evaluate reproductive failure should be engaged. Assist with incubation and pediatric problems Aviary Visits Veterinarians and their staff should be aware of po- Commercial Breeder vs. Hobbyist tential biosecurity hazards to avoid being mechanical The primary goal for the commercial breeder is to vectors for disease transmission between individual produce young companion birds at a profit. The veterinarian endangered species, species that inherently make should visit only one avicultural facility a day, pref- poor pets, species that reproduce poorly in captivity erably in the morning prior to entering the hospital. These clothes a particular-sized facility should be carefully evalu- then remain at the facility for laundering. Increases in housing density may be economical but can also contribute to the incidence and severity When it is necessary to handle a bird in the aviary, it of disease outbreaks, necessitating a detailed moni- is important to remove the bird from its enclosure toring system to prevent health hazards. This can be mercial breeder should select species that are easy to achieved by having all necessary equipment and sup- produce in captivity, that adapt well to the environ- plies readily available, with the least number of peo- ment in which they will be kept and are popular, ple involved and minimal noise. A program was established in 1992 for phasing Selling Birds out the importation of wild-caught birds; the avail- Offering a liberal warranty may be used as a method ability of these birds is limited to aviculturists who to sell birds. However, long-term guarantees given on are willing to participate in cooperative breeding the health or life of birds, especially unweaned neo- programs. Pre-sale testing for se- exposure of immunologically naive birds to pre- lected infectious diseases such as polyomavirus, viously unencountered pathogens. The best guarantee of good time necessary to control some of the diseases that health would logically stem from a stable flock of have already been introduced to the aviary through known health history and good husbandry practices. Pet retailers and breeders often require a veterinary examination within a certain period of time in order The purchase of captive-bred birds for breeding stock to activate a guarantee. Many psit- tacine and passerine species have adapted well to A suggested guarantee may last for 14 to 30 days captivity and breed prolifically in properly designed post-purchase as long as the buyer has the bird ex- aviaries. An immediate refund be difficult to breed in captivity will require further should be considered if the buyer’s veterinarian de- work. In some cases, hand-fed neonates are not termines that a bird has a health problem. The vet- thought to produce well in captivity, while in other erinarian must practice good judgement in recom- cases these birds reach sexual maturity at a much mending return, and not reject birds for frivolous or younger age than expected and readily reproduce. Although the purchase of culled breeders from an- other aviculturist should be viewed with suspicion, The New Bird moving a pair of healthy, unproductive birds to a new Acquisition environment frequently initiates breeding activity. Initially, most aviculturists have little concept of Care must be taken to avoid the purchase of smug- which species they will ultimately be breeding. Bargain-priced birds should always be often acquire, and later sell, many pairs or individual viewed suspiciously. The addition of illegally im- birds before determining which species are best for ported (smuggled) birds to a collection has both un- their aviary. The buyer should attempt to obtain as much informa- Choosing species that can easily adapt to the climatic tion as possible about the seller and the bird before conditions of a region will usually increase breeding success. A healthy, pre-existing aviculturist/veterinarian relationship ensures fast action if a disease outbreak occurs. Ideally, the aviculturist should attempt to envision The level of husbandry advice provided by the veterinarian what he or she would ultimately like to accomplish must be adjusted to compensate for the experience of the before establishing an aviary collection. If a bird leaves a facility for any reason and is exposed to Sources of birds for captive breeding include im- any other birds, it should be considered contaminated and ported wild-caught birds, captive-bred juvenile birds must be placed in quarantine before return to the aviary. The first question to ask the potential exposed to any other birds, it should be considered seller would be, “Why is this bird or pair being sold? Neonates The aviculturist should determine the original source that leave the nursery and come into contact with of the bird. If the bird was wild-caught, it is wise to other birds should not re-enter the nursery. If the bird has changed owners several times, it is best Quarantine Facilities to determine why. For captive-bred birds, it is advis- Facilities used for quarantine will vary among able to determine where the bird was produced, when aviculturists. In many instances there is no opportu- it was hatched and if the bird was parent-raised or nity for strict segregation of new arrivals, and in hand-fed. If the bird is represented as captive-bred these cases it is prudent not to add new birds to a but is not closed banded, it is useful to know why. Ideally, birds in quarantine should be housed Determining the genealogical history of the bird, separately from the remainder of the collection for a determining if any previous health problems have minimum of sixty days.
South African Geranium Extracts of this African plant (Pelargonium sidoides) have been shown to exert a number of effects beneﬁcial in upper respiratory tract infections buy ranitidine 150 mg without prescription, particularly acute bronchitis buy ranitidine 300 mg, an indication for which it is an approved drug in Germany (see the chapter “Bronchitis and Pneumonia”) cheap ranitidine 150 mg on-line. A stroke can be the result of a lack of blood ﬂow (ischemia) caused by blockage from a blood clot (embolism) or a hemorrhage (leakage of blood). Without oxygen, the nerve cells become damaged or die, and the affected area of the brain becomes unable to function. A stroke may result in an inability to move one or both limbs on one side of the body, inability to understand or formulate speech, or an inability to see on one side of the visual ﬁeld. If the stroke is severe enough or occurs in a certain location, such as parts of the brainstem, it can result in coma or death. Stroke is the leading cause of adult disability in the United States and the third-leading cause of death. It must be administered within a few hours of a stroke to produce signiﬁcant beneﬁt. The results of stroke can affect patients physically, mentally, or emotionally, or in any combination of the three ways, and can vary widely depending on size and location of the lesion. The physical disabilities that can result from stroke include muscle weakness, numbness, pressure sores, pneumonia, incontinence, apraxia (inability to perform learned movements), difﬁculties carrying out daily activities, appetite loss, speech loss, vision loss, and pain. Emotional problems after a stroke can result from direct damage to emotional centers in the brain or from frustration and difﬁculty adapting to new limitations. Poststroke emotional difﬁculties include anxiety, panic attacks, flat affect (failure to express emotions), mania, apathy, and psychosis. Almost half of stroke survivors suffer poststroke depression, which is characterized by lethargy, irritability, sleep disturbances, lowered self-esteem, and withdrawal. Emotional lability, another consequence of stroke, causes the patient to switch quickly between emotional highs and lows and to express emotions inappropriately, for instance with an excess of laughing or crying with little or no provocation. While these expressions of emotion usually correspond to the patient’s actual emotions, a more severe form of emotional lability causes patients to laugh and cry pathologically, without regard to context or emotion. Some patients show the opposite of what they feel, such as crying when they are happy. Cognitive deﬁcits resulting from stroke include perceptual disorders, speech problems, dementia, and problems with attention and memory. A stroke sufferer may be unaware of his or her own disabilities, a condition called anosognosia. In a condition called hemispatial neglect, a patient is unable to attend to anything on the side of space opposite to the damaged hemisphere. Up to 10% of all stroke patients develop seizures, most commonly in the week subsequent to the event; the severity of the stroke increases the likelihood of seizures. Therapeutic Considerations For most stroke patients who suffer from poststroke disability, recovery is a concerted effort that involves physical therapy, occupational therapy, and speech-language therapy. We recommend taking advantage of these services, as they can greatly aid the rehabilitation process. Medical care is often focused on preventing another stroke and most often utilizes anticoagulant therapy with warfarin (Coumadin) or antiplatelet therapy with aspirin or clopidogrel (Plavix), ticlopidine (Ticlid), and so on. These drugs are designed to prevent blood clots from forming and lodging in the brain, where they can produce another stroke. From a natural medicine perspective the goals are similar, but more focused on maximizing blood ﬂow and nutrition to the damaged areas. The general guidelines offered in the chapter “Cerebral Vascular Insufﬁciency” are valid here. Ginkgo biloba extract increases blood ﬂow to the brain, improves the production of energy within nerve cells, and favorably affects blood viscosity (thickness), resulting in improved blood ﬂow characteristics within the brain. Natural Antiplatelet and Fibrinolytic Therapy There are a number of dietary and supplements to reduce the aggregation of platelets as well as reduce the formation of ﬁbrin and thereby prevent blood clots from forming. The general dietary factors that reduce platelet aggregation and promote ﬁbrin breakdown (ﬁbrinolysis) are discussed in the chapter “Heart and Cardiovascular Health. Fish oil supplementation can deﬁnitely be used in combination with aspirin and other platelet inhibitors,2 but if several natural antiplatelet agents are used at the same time or if nattokinase is used, it is important to avoid the use of antiplatelet drugs (including aspirin). There are case reports of hemorrhagic strokes that occurred when a natural agent (e. Precautions with Coumadin The drug Coumadin works by blocking the action of vitamin K. Since green leafy vegetables and green tea contain high levels of vitamin K, you should avoid increasing your intake of these foods while taking Coumadin. You can usually eat the same levels you’re accustomed to—just don’t increase your consumption. Your physician will monitor your blood clotting ability and will change your dose up or down as needed. In addition to foods high in vitamin K, other natural remedies may interact with Coumadin. For example: • Coenzyme Q10 and Saint-John’s-wort (Hypericum perforatum) may reduce Coumadin’s efficacy • Proteolytic enzymes, such as nattokinase and bromelain, and several herbs, including Chinese ginseng (Panax ginseng), devil’s claw (Harpagophytum procumbens), and dong quai (Angelica sinensis), can increase Coumadin’s effects. We generally tell people taking Coumadin to avoid these products at higher dosages (more than the equivalent of one clove of garlic per day for garlic or more than 240 mg per day of ginkgo extract) but not to worry if they are just on the typical support dose of garlic or ginkgo. Take Coumadin and products that contain iron, magnesium, or zinc products at least two hours apart. To reduce the likelihood of bleeding and easy bruising with Coumadin, we recommend taking 150 to 300 mg of either grape seed or pine bark extract per day. In double-blind studies both have been shown to be useful in promoting recovery from a stroke.
Osteomas may and possible matrix material; however buy ranitidine 300 mg mastercard, histopathology originate from the cranium buy generic ranitidine 300mg line, scapula best ranitidine 150 mg, tarsometatar- is required to determine whether the neoplasm origi- sus, plantar foot pad and elbow joint. They often arise on the plantar frequently than osteomas and usually originate from surface of the foot pad where they may be subjected the proximal or distal portion of long bones including to trauma with subsequent hemorrhage and ulcera- the radius, humerus, femur, tibiotarsus and tar- tion of the overlying epidermis. Variable amounts of sulfated mucopolysaccharide matrix and lacunae Histologically, osteosarcomas are composed of poly- may be observed. Bony trabeculae may be present but disor- Chondrosarcoma: Chondrosarcomas are very rare in ganized. A chondrosarcoma has nective tissue, and myxomatous matrix also may be been reported involving the metatarsal-phalangeal present. The differential diagnosis for in- creased medullary opacity of long bones includes osteopetrosis, polyostotic hyperostosis, metastatic neoplasia, hypertrophic osteopathy and metabolic bone disease. Osteopetrosis: Osteopetrosis is defined as marked subperiosteal proliferation of bone resulting in loss of medullary space, increased bone thickness and de- formity. Osteopetrosis in chickens occurs sporadi- cally and is caused by leukosis/sarcoma virus infec- tion. Depending upon the strain of virus, osteopetrosis may be experimentally induced within one to three months of virus inoculation with a dis- ease frequency of 60-100%. Osteoclast numbers are normal, but a marked was fluid-filled (serosanguinous), and cytologic evaluation of the increase in osteoblastic activity exists. Histologically, the increased medullary density is the result of formation of bone spicules throughout the Neoplasms of the urogenital system are reported marrow cavity. Surveys in budgerigars indicate served in the lung parenchyma of chickens, especially an 11. This condition probably represents abnor- common as ovarian and oviductal neoplasms. This mal embryonic induction of mesenchyme or germ observation may be explained partially by the pres- cells displaced from adjacent bronchi during develop- ence of bilateral testes in the male but only one ment. Histologically, nodules of cartilage or bone are Larger neoplasms may cause abdominal distention present within the pulmonary parenchyma. Some renal, testicu- lar, ovarian and oviductal neoplasms may cause uni- Ectopic pulmonary ossification has been observed in lateral or bilateral leg paresis or paralysis with diffi- an Orange-winged Amazon Parrot and a Senegal 12,51,92 culty or inability to perch. Survey radiographs in both birds detected the nerves of the sacral plexus pass through the mid multifocal opacities throughout the lung fields, sug- portion of the kidney where they are subject to com- gesting deep mycosis or metastatic neoplasia. Lastly, biopsy specimens, however, contained only small foci gonadal neoplasms may be associated with various of osseous tissue within the parenchyma. An initial radiograph (left) indicated osteolysis of the distal femur that was diagnosed as osteomyelitis. A second radiograph (middle) taken seven weeks later indicated increased soft tissue swelling and osteolysis. A third radiograph (right) taken three months after initial presentation indicated a pathologic fracture with marked osteolysis. Histologically, these neoplasms are com- Renal neoplasms usually occur unilaterally, but may posed of vesicular epithelial cells arranged in sheets, occur bilaterally, and presenting complaints gener- nests, cords or tubules. Epithelial cells may be cuboi- ally include an inability to perch or ambu- dal to columnar, especially those cells involved in late. A few multinucleated cells and scattered mitoses may be observed within the neoplasm. In poultry, renal neoplasia is usually a se- plasms that are observed infrequently compared to 101 renal adenocarcinomas. Epithelial cell cytoplasm may be slightly more the renal fossae, neoplasms are difficult to isolate and basophilic. Embryonal Nephroma: Embryonal nephroma Finally, the kidneys are highly vascular and marked (nephroblastoma, Wilms’s tumor) has been observed hemorrhage is expected. Treatment of renal neoplasms most commonly in chickens infected with leukosis using radioisotope implants appears promising, but 143 (sarcoma) virus. His- tologically, epithelial cells are ar- ranged in solid masses of variably- sized tubules or cords. Characteristic features include the formation of tu- bules and glomerulus-like struc- tures. Radiographs indi- cated a large soft-tissue opacity in the abdomen and polyostotic endosteal hyperostosis of which further undercores the em- the long bones. The clinical and radiographic findings were highlysuggestive of a gonadal bryonal nature of the neoplasm. Histopathology confirmed a sertoli cell tumor, which was probably secreting low Rare metastasis to the liver and levels of estrogen (courtesy of Jane Turrel). In rare instances, a collision tumor may be observed in which two or more cell lines are involved in the neoplastic process. Definitive di- agnosis of the following neoplasms is dependent upon histopathologic ex- amination. Orchiectomy is the treat- ment of choice but must be initiated early for a successful outcome. Sertoli Cell Tumor: Sertoli cell tumor is one of the most frequent testicular neoplasms encountered in captive and free-ranging birds. If neoplastic Sertoli cells are synthesizing estrogen, feminization may be present. This phenomenon is most noticeable in male budgeri- gars in which the cere color changes from blue to brown (Figure 25. Radiographs indicated a renal mass that had invaded the synsacrum, causing osteolysis cranially anorexia, ascites and abdominal enlargement (occa- and sclerosis caudally. The mass extended dorsally to the syn- sionally with a palpable intra-abdominal mass).